Review on 💗 Mio Slice Heart-Rate-Monitors: Black, Large - Advanced Fitness Tracking at its Best! by Josh Heelis

This is just a quick review after a few days of using my Slice. I bought it because of the heart rate monitor and I can confirm that it is very accurate indeed. I link it to MapmyWalk to track exercise intensity and graph time spent in different target zones and it works great. Keep in mind that if you want to use both an app like Mapmywalk and the Mio PAI app, you'll probably need to force quit the app before you can connect to the other. Disabling the bluetooth connection or restarting the phone also works (at least on my Android 7.0). It's been almost 72 hours since I've worn it without charging even though I've turned off notifications. I expect battery life can vary wildly depending on configuration and usage. When it arrived it had less than 25% charge and fully charged in about 100 minutes, so battery life isn't an issue for me at the moment. As a cheap and accurate bluetooth heart rate monitor. A+ Bonus Feature: The PEI number is not the reason I bought this. However, after using it and reading the supporting Norwegian study that created/validated PEI, I find the PEI tracker more important to me than linking heart rate to an app. I suspected I had a good workout beforehand, but found I had to step up a notch to get 100 points in the first week. Not much, mind you, but enough to make me feel like I've done a little more. It's easy to slip into your comfort zone in your routine, but this number, PEI, has to pick you to pick it up! The PEI algorithm definitely rewards a higher heart rate. I encourage you to visit the Mio website and do your own research on PEI, it was designed to be a simple and effective metric for the latest (i.e. accurate) heart rate trackers. Mio is the first company (there will probably be more) to implement this in their gear and as far as I can tell they have succeeded. An A++ rating for what motivates me to try harder. Cons: The clasp on the bracelet comes loose easily when I put on my coat. Probably the biggest downside is the fact that it doesn't upload your data to a website for aggregation and deeper analysis like Fitbit or Mapmy etc. Although the heart rate date will be integrated and uploaded to your connected fitness tracker, the data will not be PEI. Is it a universal law that mankind cannot have everything in one product? I will update this post if there are future reliability issues. Btw, I took mine to the Revain Warehouse as a $42 repair, so it was a no-risk test run for me since I reduced the value of the PEI feature when I bought it. However, after use I will not hesitate to buy a new one at full price, after all, the same study reportedly showed a 7-year increase in life expectancy for a middle-aged man maintaining 100 PEI weekly. Stairs.**.8 MONTHS LATER***1. Liked the PAI even more. It's a great watch for getting you off the couch and into the fitness of your life if you're a bit self-motivated of course. Forget counting steps, heart rate is the main thing2. Screen brightness is annoying. Unreadable in the sun, so you'll have to rely on the fitness app on your phone if you want to keep a close eye on your pace. Not a deal breaker, but annoying.3. The battery life is average. It takes a few days, but the charging time is amazingly fast (less than 30 minutes for a full charge).4. Features: Trying to count steps, sleep, etc. is pointless for almost all products due to accuracy (algorithms "guess" most of the time basically). I have turned off these ads. ACCURACY. The heart rate monitor is the reason I bought it and it's pretty accurate most of the time. I've tested it with different heart rate monitors and it's good enough for heart rate zone training. EXCEPT when it gets crazy. Like in the middle of a 3 mile climb (bike) and you see your heart rate drop from 80% to rest. Wow, I WANT to be in this shape. This will fix over time but is quite annoying. My guess is that the fit of the strap in concert with sweat moisture will distort the optical sensor. This seems to be a common problem with current HR optics technology across the board. Bracelet sucks. It weakens at the slightest bump on the object, it cannot be adjusted. Not very stylish either, although SLICE's design isn't a trendsetter anyway. (Without that PAI number) I paid $40 for mine and am happy with that price. I'm looking forward to replacing it as I want more battery life when hiking or camping. At the moment (10/18) this technology is not in any of the optical heart rate monitors on the wrist, so I'll wait and see what new models will bring. I'll miss the PAI metric feedback, but now I know what activity level and activity frequency it takes to keep it above 100. Ready to fly solo, so to speak :)