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Mio FUSE Heart Rate, Sleep + Activity Tracker

2.7 2.7 out of 5 stars 414 ratings
Brand Medisana
Color Aqua
Compatible Devices HTC One (OS v4.3+), Samsung Galaxy Note 10.1 Sony Xperia Z, iPhone 4s, Sony Xperia Tablet Ultra, Motorola Moto X, LG Nexus 7, Motorola Droid Ultra, LG Nexus 5, Sony Xperia Tablet Z, LG Nexus 4, Sony Xperia V, iPod Touch 5th Generation, Motorola Droid RAZR M, HTC One M8, Samsung Galaxy S4 Mini, Samsung Galaxy Note 2, Samsung Galaxy Note 3, Samsung Galaxy S5, Samsung Galaxy S4, Samsung Galaxy S3, iPad 3rd Generation, iPad Mini 2nd Generation, Sony Xperia SP, Motorola RAZR Max HDD, iPhone 6, Sony Xperia Z1, iPhone 5, iPad Air, Maxx, iPad 4th Generation, Sony Xperia Tablet ZL, iPad Mini 1st Generation, Motorolo Moto G, Sony Xperia Tablet ZR, Mini (OS v4.4+), Sony Xperia Z1 Compact, LG G2, LG G Pro2, Samsung Galaxy S5 Mini See more
Screen Size 1.3 Inches
Item Weight 1.4 Ounces
Battery Life 7 days
Sensor Type Wearable
Battery Description Rechargeable

About this item

  • Get accurate wrist-based heart rate during exercise.
  • Track all day activity, including sleep, steps, calories, distance, pace & goal. Tracking sleep requires a simple software update.
  • Sync wirelessly via Bluetooth Smart (4.0) to popular fitness apps.
  • Works exclusively with Mio PAI app (Personal Activity Intelligence).
  • Water resistant up to 30m (3 ATM / 100 ft.)
  • To add sleep tracking, easily update your firmware via Mio GO app.
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From the manufacturer


Personal Activity Intelligence

PAI (Personal Activity Intelligence) is a revolutionary new metric that measures your body’s response to physical activity, providing guidance on how much activity is required to maintain optimal health. PAI can predict your overall wellness and longevity by simply interpreting your heart rate data and personal profile. Put simply, PAI helps you live healthier for longer.

The Mio PAI app is available for iOS and Android and works exclusively with all Mio wearable products.

Mio FUSE Heart Rate, Sleep + Activity Tracker

At-A-Glance Data At Arm's Length

Mio FUSE is a sleek all-in-one performance wristband that combines the features of a heart rate monitor, sports watch, and activity tracker. Monitor the intensity of your workouts and your movement throughout the day for a more comprehensive look at exertion, recovery, and overall fitness than any other product on the market.

FUSE transmits heart rate via Bluetooth Smart (4.0) and ANT+, so you can display and store heart rate data with your smartphone, bike computer, GPS watch, or any other compatible device. Other features include:

  • Precision heart rate from the wrist, no chest strap needed
  • Tracks sleep, steps, calories, distance, pace & goal progress
  • 5-color LED and vibration alerts to indicate heart rate zone.
  • Up to 30 hours of workout data storage or 2 weeks of daily activity data
  • Customizable display & configurable heart rate zones
  • Water resistant to 30 meters.
  • Works with Mio PAI app

Performance Accurate Tracking of Your Entire Day!

Heart Rate

Your heart rate provides insight into how hard you’re pushing yourself and how well you’re recovering. Use FUSE and get the most out of your workouts!

Calories

FUSE uses a sophisticated algorithm based on your height, weight, activity level, and workout intensity to determine your calorie burn. Heart rate monitoring allows us to provide more accurate estimate than an activity tracker alone.

Sleep, Steps, Distance, and Speed

FUSE tracks your steps, calories, distance, pace, and goal progress throughout the day, along with your sleep quality and resting heart rate throughout the night.

Connect Your Fitness Experience

With built-in Bluetooth Smart and ANT+ connectivity, Mio FUSE frees you to connect and share your fitness data in real-time with dozens of popular iPhone and Android fitness apps, GPS watches, and bike computers.

Why PAI is the Best Activity Metric!

Mio is a pioneer in Heart Rate Technology, and we are now introducing a revolutionary new metric and app that makes sense of your heart rate data. PAI is a free app and exclusive to Mio wearables.

It’s Meaningful: Other metrics such as steps provide limited insights into physical activity, as not all steps are created equal, and not all exercise involves steps. The most accurate way to assess the health benefits from activity is to analyze an individual’s heart rate data.

It’s Simple: The goal is to maintain a minimum score of 100 PAI for maximum health benefits. PAI makes sense of heart rate data.

It’s Personal: PAI is calculated based on age, gender, resting heart rate and maximum heart rate. It is a personalized experience that makes the 100 PAI goal and all PAI calculations customized and accurate for each individual.

It’s Scientific: The Mio PAI algorithm is founded upon data collected from the HUNT Health Study over a 20-year period involving 60,000 participants conducted by the Nobel Prize-winning Faculty of Medicine at the Norwegian University of Science and Technology.

In The Box:
  • Mio FUSE heart rate monitoring wristband
  • USB charging dock with magnetic alignment
  • Mio FUSE Quick Start Guide
  • Mio FUSE Warranty Information
Compatibility Information

A compatible smartphone is required for FUSE setup. Visit our website for up-to-date information on compatible device models.

Technical Specifications

Connectivity: Bluetooth 4.0 and ANT+.

Sensors: Optical heart rate and 3-axis accelerometer.

Battery: Rechargeable Li-Poly.

Battery Life: 7 days with 1 hour workout/day.

Offline Data Storage: 2 weeks of daily activity + 30 hours of workouts.

Water Resistance: 3 ATM (30 meter).

Sizing Information

Mio FUSE is available in two sizes.

Aqua Regular (S/M) Strap: fits wrists 5.8 – 7 inches/ 147 – 179 millimeter.

Crimson Long (L) Strap: fits wrists 6.1 – 8.2 inches/ 156 – 208 millimeter.

Why Train With Heart?

Heart rate training is the most effective way to track your fitness and improve your performance. That's why Mio develops innovative, easy-to-use products that make heart rate monitoring comfortable and accessible for all athletes.

Key Benefits:

- Understand your physiological response to exercise with real-time, continuous feedback.

- Prevent injury caused by overtraining and improper pacing.

- Improve workout efficiency and effectiveness by training in the appropriate heart rate zone.

- Develop your body’s ability to use fat as fuel.

- Accurately track your progress.

Product Description

Mio 59P-REG Fuse Heart Rate Training Band, Medium/Small OPEN BOX

Product information

Technical Details

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Mio FUSE Heart Rate, Sleep + Activity Tracker

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Customer reviews

2.7 out of 5 stars
2.7 out of 5
414 global ratings

Customers say

Customers like the comfort of the biometric monitor. However, they have reported connectivity issues with the app and the device. They also dislike the size. Opinions are mixed on accuracy, quality, performance, ease of use, and reading experience.

AI-generated from the text of customer reviews

30 customers mention21 positive9 negative

Customers like the comfort of the biometric monitor. They mention it's very comfortable during the day, and it'll not bulk up. The product is made of a soft rubberlike material that conforms comfortably to the wrist.

"...the device is quite comfortable on the wrist. It's made of a soft rubberlike material that conforms comfortably to the wrist and it is not bulky..." Read more

"...The band itself is comfortable and unobtrusive. It has made some smart decisions such as reserving HR usage to workout modes only...." Read more

"...That apart the device is v comfy and very quick and responsive...." Read more

"...It works just fine but it actually is very uncomfortable in bikram, especially during the floor series when you lie on your stomach...." Read more

90 customers mention49 positive41 negative

Customers are mixed about the accuracy of the biometric monitor. Some mention it's the most accurate heart rate monitor out there that doesn't require a cumbersome chest, while others say it wouldn't track heart rate consistently, the built-in calorie tracker is extremely inaccurate, and the ability to measure sleep is lacking.

"...the HR displace stays on during the workout, so it is very easy to see your workout intensity right off the wrist...." Read more

"...The heart rate function was poor when doing martial arts. It was very inaccurate...." Read more

"...The Fuse comes highly recommended for it's HR accuracy...." Read more

"...It does track my swim workouts however my workouts are very consistent - my data is not - my sense is that it doesn't always make a good connection..." Read more

72 customers mention27 positive45 negative

Customers have mixed opinions about the quality of the biometric monitor. Some mention that it's well suited to last a while based on the construction, while others say that the app is hopeless and limited in functionality.

"...said that the device had a pretty good heart rate monitor but not that great of app and lacked fancy functions. This seemed fine to me...." Read more

"...It also seems well suited to last a while based on the construction...." Read more

"...an workout being accidentally ended, then restarted, the app can NOT figure this out and will cut off the previous workout Edit See my edits to 1)..." Read more

"pros-very accurategreat battery lifeworks well in conjunction with any sports tracker app..." Read more

67 customers mention23 positive44 negative

Customers are mixed about the performance of the biometric monitor. Some mention that it works amazing with gym workouts, while others say that it doesn't do a good job displaying your stats in any meaningful way. The idea is great, but the functionality isn't, and the app is terrible. It's very buggy and not fully implemented or clunky.

"...HRM accuracy: - 4 starsIt is not bad. Definitely not as good as chest strap and it does give you some weird low HR numbers from time to time..." Read more

"...All of this seemed to work well with my gym workouts.The heart rate function was poor when doing martial arts. It was very inaccurate...." Read more

"...The app is easy to use, although a bit glitchy at times... nothing too bad...." Read more

"...I also wore it to Bikram tonight. Still a major issue for the floor series. I turn my arms so the touch points don't hit the ground...." Read more

49 customers mention16 positive33 negative

Customers are mixed about the ease of use of the biometric monitor. Some mention that it's easy to set up and use, with a simple and elegant design. They also say that the information the device is collecting is easy to pull up. However, some customers report that the instructions are not super intuitive, the owner's manual is not very helpful, and the documentation is not the best.

"...place it on the very surface of the device, it can be easily turned on and off by accident...." Read more

"...Other times they are easy to use. They only want to work when they want to work. The biggest most frustrating thing ever is that app...." Read more

"...The software is just awful...not intuitive to use...." Read more

"Update 03/04/15: Item returned.Got frustrated with the lame and boring looking app which wasn't giving me the information I wanted...." Read more

19 customers mention9 positive10 negative

Customers are mixed about the reading experience. Some mention that their workouts are very consistent, and they have more control over their cardio training. However, others say that the band loses their reading and sometimes cuts in and out of workout readings. They also mention that the pedometer works well but becomes irrelevant on non-step sports such as cycling.

"...It does track my swim workouts however my workouts are very consistent - my data is not - my sense is that it doesn't always make a good connection..." Read more

"...i.e. When I was doing pull up, all the sudden HR read dropped to 61 while wahoo told me it was 110. Obviously 61 was incorrect...." Read more

"...It didn't loose my heartbeat not once during the craziness of jumping around, Cant say the same for the Basis Peak...." Read more

"...The pedometer works well but becomes irrelevant on non-step sports such as cycling...." Read more

39 customers mention6 positive33 negative

Customers are dissatisfied with the connectivity of the biometric monitor. For example, they mention that the app wouldn't consistently sync and pair, the website doesn't sync exactly, and it doesn''t always make a good connection. Some say that it stopped syncing with GPS even though Map My Run worked perfectly.

"...I knew the app wasn't that great, but this is ridiculous. It doesn't sync your workouts and only sometimes syncs your daily activities...." Read more

"...me good read of all the information I needed, but Mio did NOT give me anything after sync...." Read more

"...I could not get it to reconnect to HR. After that for like 10 minutes, it kept switching from paused to no HR back and forth...." Read more

"...It also stopped syncing with GPS even though Map My Run worked perfectly...." Read more

20 customers mention4 positive16 negative

Customers are dissatisfied with the size of the biometric monitor. They mention that it's a little bigger than the Fitbit, but quite comfortable to wear all day long. Some say that the band seems to run slightly smaller than normal, and that the tracker is a bit bulky.

"...I don't even know if I'd use it as an activity tracker, since its a little bulky and lacks sleep tracking." Read more

"...' pop watch, which is a very good device, but to my dismay, rather small in size (even for a medium wristed person like me) and lacks a heart rate..." Read more

"...I sent a message to Amazon but never got a response. The bracelet is extremely bulky -- more so than any of the others that include heart monitors...." Read more

"...So, I was able not to pause of stop it so HR measured wonderfully. Love this device.UPDATE 2/13/15:..." Read more

Women read this!
3 Stars
Women read this!
First off my wrist measures exactly 6" completely around (about 2" above my wrist bone) & Directions state to place this item about 2" from your wrist bone. But the problem I occurred was it was too wide for my wrist. The top part of this band is in a hard casing that does not flex/bend that measures approximately 3" long. So even if your wrist fits the measurements given in the description it doesn't necessarily mean it is going to fit your wrist. I ended up having to return it. The reason I gave this product 3 stars is because the operational side of this band is one of the best (better and more accurate than a Fitbit in my opinion.) But it seems this band was made more for men in mind. There are only two sizes provided which is a red band that fits medium to large wrists and a blue band that is more for medium to small wrists. But in order to get this band to sit flat on my arm I literally had to put it on the middle of my arm.
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Top reviews from the United States

a girl
1.0 out of 5 stars it's good but the app ruins everything
Reviewed in the United States on March 25, 2015
Verified Purchase
This product seemed like the perfect device for me. I looked at youtube reviews and they all said that the device had a pretty good heart rate monitor but not that great of app and lacked fancy functions. This seemed fine to me. I wanted something that tracked my calories and told me how hard I was working in the gym. For the most part the heart rate monitor seemed pretty accurate in most cases. I would workout and it would it was consistent with the monitors the gym lets you use. When I was lifting it showed that my heart rate stayed up there which is what I wanted to see. A really great feature, one of the reasons I wanted this watch, was the color coded heart rate zones and the vibration that alerts you when you change zones. All of this seemed to work well with my gym workouts.

The heart rate function was poor when doing martial arts. It was very inaccurate. It would say my heart rate was high when I was doing nothing and low when I was doing activities. I mostly bought it for the gym so this wasn't all that important.

What got this watched returned and a one star review was the app and little irritating things. As others have mentioned the buttons on the device are hard to activate sometimes. Other times they are easy to use. They only want to work when they want to work. The biggest most frustrating thing ever is that app. I knew the app wasn't that great, but this is ridiculous. It doesn't sync your workouts and only sometimes syncs your daily activities. I got it to sync once, and the detail of the heart rate graph was just terrible. The daily activities only show the basic overall steps and calories and what not for your day, there is no way to compare. And that is when it syncs, most of the time it will partially sync your daily workout, sometimes not at all. Sometime the app doesn't even recognize that your watch is right next to your phone, even if you do everything right.

But really this watch is good and the app is so bad it offsets the good. Maybe if they ever fix the issues with the app I might get it again, but it is to frustrating to have right now. I don't recommend purchasing it, because without a decent way to interpret the data, its pretty much useless.
2 people found this helpful
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L.O.
2.0 out of 5 stars Decent HRM hardware, but its app is subpar and under-report calorie by 35%-55% in workout mode!
Reviewed in the United States on January 23, 2015
Verified Purchase
Final Review on this Mio Fuse. I will keep it 2 stars after 1 month use. Here are the breakdowns:

Hardware overall : Score 3 stars

Look/feel: - 3 Star
It is not a piece of product you will get compliments from wearing it as a watch. People may not even notice that. It was made by some sort of black rubber/silicon. If you are wearing it in the gym, it is fine because your goal is to maximize your workout with this product, not about showing off a piece of gear. If you are one of these, you will be disappointed.

Touch/button design: - 2 stars
The two side buttons on the screen used to change different information on the device are fine. However, the top button to get you in and out of the workout mode (most important function IMO) has serious design flaw. You can't really see it with your eyes due to it blends in with all black color. It takes several tries to get in or out of workout mode for me every single time. It frustrates me. In addition, because it is out on the surface, it is very very easy to be accidentally pushed/pressed during the workout. There is no vibration notifying you about that. It means you may miss a chunk of your workout recording by the end. It definitely drives me crazy when it happens. I am sure it will do to you too.

location of wearing: - 3 stars
As suggested, it must be worn about a few inch above your wrist bone for more accurate HR reads. If you are doing aerobics or high intensity workout involving arm movement, Mio fuse may slip down from the preferable location unless you are wearing it with very uncomfortable tightness. I guess it applies to all wrist wearing HRM so it will be an industry flaw not only Mio's to be fair.

HRM accuracy: - 4 stars
It is not bad. Definitely not as good as chest strap and it does give you some weird low HR numbers from time to time every workout. But for tracking an overall workout, it gets the job done. Also the HR displace stays on during the workout, so it is very easy to see your workout intensity right off the wrist.

Software/App - Mio Go - 1 star

I really want to like this product due to its pretty accurate HRM. I can see all those heart rate #s, but by the end of the day, it must give me an accurate calorie burnt number. Mio Go completely blew it on this. Using Mio fuse as same single source of heart rate, I compare over and over again with Endomondo, Wahoo fitness app and Mio Go. Mio go's calorie burnt number after EACH workout was 35% to 55% lower than the other two apps and the other twos apps designed by completely different company provided almost identical calorie #. It is UNACCEPTABLE! Unless Mio can prove that their calorie calculation algorithm is accurate and others are not, its app completely discredits people's hard work. I repeatedly wants their customer service to post something regarding this issue. So far, I have NOT seen any.

Also, the inaccurate calorie # can NOT be shared with health app or the most popular myfitnesspal app. They said they are working on the integration with apple health app but no plan for others yet.

The sync between Mio fuse and Mio go can be buggy from time to time.

The workaround:

If you maintain the faith of Mio fuse for future improvement and not return the product, you have a workaround to use Mio fuse as HRM but use Endomondo, Wahoo fitness or other fitness apps to track your calorie. The drawback of the walkaround is that you now have to keep your phone with you during the workout at all time due to bluetooth connection. You can NO LONGER enjoy the benefit of sync data later function.

Words to Mio:

You have a piece of decent HRM hardware. Please please get your developers together to fix your software. Your calorie # is way way off. and for next generation mio fuse, relocate your workout on/off button.

Old testing review:

******

This review will be updated based on more experience I have with this product. It will be ended either I keep it or return it.

I have had Mio Fuse for 3 days now. I had pretty high expectations for this product based on the reviews I read and would love to give it 5 stars if it suits my needs. My purpose of buying this product is to replace my Wahoo Tickr HRM chest strap for 1) accurate active HR reading (training with heart) and 2) its late sync ability (go with iphone free while workout). So far, NOT so good...

During the next a few weeks, I will wear both mio and Wahoo TickR to do various workouts in the gym to compare their data and functionality.

Day 1: Weight training

The app set up was easy and took me 2 mins. I worn Mio half inch above my wrist bone and started to do weights, bench bar bell, dump bell, cable, etc. I noticed that Mio and Wahoo had some different reads, a lot of time Mio's HR's read is 20 beats lower than Wahoo's. To avoid user error, I moved Mio to about 1.5 in above my wrist bone and tightened it really good. The read consistency has improved a bit, but sometimes still 10-15 off Wahoo's.

When I moved to side arm raise machine (your forearm and wrist under a padded component to raise up working on your side shoulders), accident happened. The top bottom designed to start and end a workout by pressing and holding were switched off because of the wrist position from the pressure of the pads. So I had to manually turn it back on after noticing it was off (no HR read). It happened twice : workout start -> ended by accident, then start again (manually) - end by accident again, then start again (manually). I guess I will need to turn Mio inwards next time to avoid this situation. But that workout on/off button was designed too much on the top surface of the device, it will be very easily turned on and off by accident. It has to depend on the app to determine whether it is an accident or really a workout circle (more on this later). Then I moved onto rowing machine and treadmill, Mio works very well on those tests with almost identical reads with Wahoo's.

Sync time: After I completed my workout, I synced both Mio and Wahoo with their respective apps to see the final result. BIG PROBLEM: Wahoo gave me 1:15 time and 573 calories with average HR 107 and Max HR 156 and Mio gave me 35 mins and 225 calories with average HR 121 and max HR 158. It means Mio somehow ignored my 30 mins workout. I don't know if it was due to the accidental in and out of the workout mode. But even though, why didn't it just display 2 and/or 3 workouts but erased my entire first part of the workout?!? - NOT VERY HAPPY.

Day 2: - Boot Camp

The Mio held up well on its HR reads comparing to Wahoo on this one hour test. The problem was putting up boxing gloves to do punching bags, Mio was on its way again. I had to put it all the way up on my forearm to avoid any accident contacts to the top workout button. So it didn't get turned off at all during the workout.

Sync: Wahoo was as reliable as usually give me good read of all the information I needed, but Mio did NOT give me anything after sync. Yes, it was on workout mode the entire time (I know it because I kept watching its HR read on display) and I turned it off by the end manually. ZERO workout! I thought it probably had some sort of delay. So I kept trying and even tried after mid-night when it gives out daily activity, Daily activity got synced but my workout NEVER show up. So it ate my 1 hour workout just like that! - I am OUTRAGEOUS!

The problems after 2 days:

1) The workout on and off button designed problem and place it on the very surface of the device, it can be easily turned on and off by accident. Edit: Mio recommended to wear it upside down but how about wearing boxing gloves, how do I avoid that?
2) A huge flaw after an workout being accidentally ended, then restarted, the app can NOT figure this out and will cut off the previous workout Edit See my edits to 1) and 3).
3) The app or device erases your workout out of blue (super UNreliable if that's the case) Edit: It is resolved due to user error
4) I have no clue how to sync it to other apps, there is no such an option on mio go app. Edit: Was able to sync with Endomondo, but it raises the other issue - see below.

**
Day 3: Weight training again

First of all, I learnt that I must tap the top button to get GO after pressing + holding it. So i am more comfortable about not losing my entire workout going to gym. And I was able to sync endomondo with it as well. So this time, I had my wahoo synced with wahoo app and Mio fuse synced with Mio go and endomondo simultaneously. During the workout, I still saw strange HR read on fuse. i.e. When I was doing pull up, all the sudden HR read dropped to 61 while wahoo told me it was 110. Obviously 61 was incorrect. So I just snug/move it around a bit even it was really tight on my forearm/wrist already. 5-10 seconds later, it eventually went back to the similar read as my wahoo. I don't really understand what it happened. Was it getting loose during my movement (doubt it) or somehow the wrist HR detecting technology causing problem. I do not want to consistently checking my HR during the workout because of trusting issue. Anyhow, the final sync was successful but the results made me scratch my head.

Mio Go: Time: 1:23 | Avg HR: 103 | Max HR: 142 | Cal: 347 with Mio fuse

Endomodo (weight training mode) : Time: 1:23 | HR range: 61-142 | Avg HR: 104 | Cal: 625 with Mio fuse

Wahoo (weight training mode): Time: 1:23 | Avg HR: 106 | Max HR: 143 | Cal: 616 with Wahoo TickR Chest Strap

While everything else was about the same, the calorie count discrepancy between Mio Go app and other apps is HUGE. Even Endomodo and Wahoo were tracking data via different HRM devices, the result came out about same. Mio Go app gave me 45% less calorie count. I am not an expert on this but I have to trust the similar # here. Mio Team: Please provide me your insight on this topic.

Also I tried to lock all buttons via Mio go app after I entered the workout mode. It did NOT work. I wonder if anybody successfully made it happen. So the risk of the workout button being pressed can NOT be eliminated on software side.

Since my last cardio workout got lost (user error on day 2), I will test it out again tomorrow. The subject is Insanity workout. Stay tuned! Oh I bumped my rating to 2 stars after today.

***

Day 4: Interval Cardio - Insanity plus extra aerobic training

I didn't have time to compare Wahoo strap and Mio fuse during the workout because my phone was playing Insanity video. Here is the final result - still very baffling

Mio Go - Time: 1:23 | Avg HR: 123 | Max HR: 167 | Cal: 552 - with Mio fuse
Endomodo (Aerobic mode) - Time: 1:24 | Avg HR: 124 | Max HR: 167 | Cal: 859 - with Mio fuse
Wahoo (Cardio mode) - Time: 1:24 | Avg HR 125 | Max HR: 162 | Cal: 863 - With Wahoo TrickR strap

Once again, Endomodo and Wahoo gave me similar reads especially on calories counts even with completely different HRM devices but Mio Go app had 36% less cals. I really need an explanation on that. The Mio App's late sync function that I think I finally can workout free from a phone around. If you are a new fitness tracking device user and not experience with all other apps and such, you are fed with very deflated cals # by its original app. Is it a way to encourage you work out more? I don't know and I need an answer.

****
6 people found this helpful
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justfitz
4.0 out of 5 stars Good monitor for my needs... 4 1/2 stars
Reviewed in the United States on December 2, 2015
Verified Purchase
This HR monitor is perfect for what I needed. I usually don't bother with all the fitness tracking features it has, although I might in the future. I had to install the app on my husband's old iPhone because Mio doesn't provide an app for my Windows phone (oh well, I knew I'd be an outsider with that phone choice). The app is easy to use, although a bit glitchy at times... nothing too bad. One of my long workouts wouldn't sync with the app, no matter how many times I tried. But usually it works flawlessly. I kept things simple and set it up using the app so that the Fuse only vibrates when I reach my target HR and again when I exceed it. It has both "3-zone" and "5-zone" HR settings but I use it in 3-zone mode, which works great for the kind of training I am doing right now. You don't have to carry the phone with you; you only need to use the app when you want to change settings or sync your runs to view HR data afterward. I also have a Garmin GPS (Forerunner 15 model) watch that syncs with the Fuse automatically; it just senses it's there. Easy. I can wear the Fuse for 3 - 5 runs of at least 1 hour apiece before I have to charge it.

Recently there was a firmware update which improved a few things, such as making it harder to accidentally pause the 'workout' mode by merely touching the face of the watch. With that improvement, I would say this rates 4 1/2 stars.
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Top reviews from other countries

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Hongping
1.0 out of 5 stars The charge doesn't work
Reviewed in Canada on April 17, 2019
Verified Purchase
It is terrible! It looks opened before and the charge doesn't work yet. I have applied for return.
One person found this helpful
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DallasG
4.0 out of 5 stars Not for the technologically challenged
Reviewed in Australia on July 13, 2023
Verified Purchase
Firstly, the tracker is good piece of gear. I bought it for heart rate monitoring. It's accurate and reliable.
The Mio Go app from Google Play is useless and out of date. You'll have to find the most up to date version 2.7.4.4 which works quite well.
The battery life is good. It's comfortable to wear, it's the sort of gear engineers would like but fashionistas would pass over. The manual is not too intuitive (probably written by an engineer), so some persistence is required.
But it's well made and does its job well.

Update as of January 2024. In use for 6 months. Major battery failure. Won't hold charge for more than 20 hours. Have contacted seller re warranty. Will update as info comes to hand.
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Techy free athlete
4.0 out of 5 stars Great product
Reviewed in India on October 6, 2016
Verified Purchase
Awesome fitness band. This is not in the likes of fitbit but more for serious athletes. Can be used with Garmin or Polar devices as well..
works both on Bluetooth and ANT+ devices...
Can be used for Swiming as well..
Very accurate optical heart rate monitor...
1 star less for the sizing and pricing issues in India
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Arancha Molinero Rubio
5.0 out of 5 stars Muy practico y comodo
Reviewed in Spain on August 5, 2016
Verified Purchase
Como pulsómetro y medidor de la actividad diaria es muy práctico. Es c'modo de llevar, no tienes que llevar banda, se carga en el ordenador y la batería dura bastante y carga muy rápido. Tiene dos modos: entrenamientos y actividad diaria. El de entrenamiento es algo mas completo y el de actividad mide calorías quemadas, pasos, kilómetros y pulsaciones. Se pueden programar los objetivos a través de su aplicación móvil y te va diciendo el porcentaje cumplido. En la aplicación también puede programar zonas de trabajo por pulsaciones y que te avise cuando las pasas, así como analizar los entrenamientos y la calidad del sueño. La aplicación es sencilla pero bastante clara.

Como contras le veo que de inicio resulta muy poco intuitivo y cuesta entender el funcionamiento, porque al ser táctil lleva un rato hacerse con lo que hay que tocar para cambiar las funciones... pero mirando las instrucciones con tiempo y paciencia, sale todo. Tampoco me gusta que a las 12 de la noche el entrenamiento se ponga a cero, porque los totales de actividad que te da son a esa hora y tu puedes querer seguir midiendo hasta que te vayas a dormir. Le falta el poder elegir tú mismo cuando se pone a cero la pulsera.

Pero en términos generales resulta una pulsera muy cómoda, nada molesta a la hora de entrenar, y con muchas información y cosas configurables. En mi caso era exactamente lo que buscaba.
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LY
4.0 out of 5 stars Works pretty well
Reviewed in the United Kingdom on July 4, 2015
Verified Purchase
DESIGN AND CONTENTS

There's a quick start guide and the full manual is via the website as with most products these days.

Fuse has a strap that uses pins you have to push into holes to secure. I think I prefer if it was designed to let you slide the loose part of the strap into a ring like regular watches.

USE

To test how accurate the heart monitor is, I followed the instructions and tested various positions along my wrist but haven't been able to get fairly accurate results. Best case scenario is around 20 beats off at rest. Running wise, it is still the same error ratio - 20 beats off.

It seems to work best when the Fuse is in the dark which, makes sense since it's shining a big green light onto your skin. Would be nice if there was a way to calibrate the Fuse but, you can always just subtract the difference yourself.

Downsides.

It comes with a short proprietary, magnetic charger - have fun replacing it. Wire is very short so you might need an extension USB cable but, you might get away leaving it dangling from your computer because the magnet is strong enough to hold the Fuse.

Maybe I've got a faulty product but the touch sensitive controls for changing the display or activating workout mode isn't very responsive. Sometimes they work great, sometimes it's just frustrating getting it to work!

APP SUPPORT

It's come a looong way since the Mio Go App first started. At first it was practically useless because it only recorded steps, total distance (very in-accurate) and max heart rate - no graph. However, the Mio team seems to have been listening on the Google Play store. Now it does have a graph of your heart-rate along with route tracking (GPS optional) and even colour codes it so that you can see the changes in zones during runs.

There's still room for improvement but I'm sure they'll come along soon with the on-going development.

If you don't like the native app, you can try Endomondo Pro which offers a basic graph but requires a subscription for zones. MayMyRun also works but again, require subscriptions to view heart rate zones. Wahoo Fitness is subscription free shows current workout zones but not as a graph.

Overall a pretty good fitness tracker and great on-going support from the Mio staff.
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