KARSEEN Fitness Tracker H2 Plus Waterproof Smart Watch with Color OLED Screen Heart Rate Monitor,Pedometer,Sleep Monitor,Step Calorie Counter Activity Tracker for Men Women

1) NEVER go to a third party site for software - especially from Russian or Chinese sources (*watch the news)2) The app for this device is available on Play and iOs stores, so you don't have to. Look for "Hey Band" app.3) I have compared this device to medical grade pulse oximetry and HR measurements - and have never had more than a 1% margin of error - W@W!4) I bought it to wear it, it's gonna get broken - purple was $10 USD less than the exact model in other colors - so I tolerate purple.5) For $20 I have been impressed. If you keep your phone in range this thing is extremely accurate.6) The vibration notification of calls is strong, and it even gets the first few lines of text on display.7) I charged fully the first time. Now only when I shower and it has not dropped below 50% charge in several weeks.8) I use the heart rate monitor constantly and have not stopped.9) Like all Bluetooth devices it has trouble synching some times - turn the band off to charge it. After charging, restart your phone and then power up the band - I haven't missed a pairing since I started doing that.10) The band doesn't have a lot of memory so it doesn't send data to your phone very fast. If they've been apart (unpaired) for a while and the band's been on your wrist - expect a long sync time, failed sync or lost data. Just take it off to charge it and keep your phone nearby and it's not an issue. (*It handles a 30 min walk with my phone in the car no problem - but it doesn't like an overnighter away from my phone.)11) The app is still a bit 'clunky' and represents the only negative present for this device - the sleep algorithms are off. If you wake up during what the algorithm thinks is hours of sleep, then don't keep it moving constantly - you'll get logged as "light sleep" even if you are reading a book, eating, or working on the computer. This was especially so for me due to a lower than normal heart rate.

Short answer: I like it. If you don't have money for a Fitbit or Garmin, this is a decent option for the money. I gave it 4 stars for price, build quality and accurate health data reporting. With a better app and slightly better build quality, it would be a solid 5 stars.Long Answer:So I got the device and it was very well packaged. It came with everything described. A USB charging cable, booklet, and the device itself. I've included photos of the device and also put it next to my old Garmin Forerunner, so you could see the size. The charging cable is REALLY SHORT. And you need to charge it with your own power brick. It doesn't come with one.The booklet is almost useless with one exception, I needed to know what App to download. It's called 'Hey Band', and is a bit weird. I'm going to walk you through it.After downloading the app, make sure your cell phone's Bluetooth is turned ON. The app will detect the fitness tracker during the setup process.Run the app and create an account. I don't recommend logging in through Facebook. There's no information on how the app treats your data. Best to just make an account the only fashioned way with an email and password. The app only works for me on WiFi for some reason. It never seems to be able to reach its server when I'm on LTE or 4G. Only on Wifi. I'm on AT&T in an area with great service.After running the app it will find the device. There's no place to set the time, the tracker gets it from your phone. My tracker wouldn't sync until I restarted the tracker. There's an option to reset the unit in the app. Once I did that, it worked.The pedometer works as expected (seems close to what my iphone reports.) Also, the heart rate monitor is pretty accurate. I used my blood pressure cuff to check it against the fitness tracker. They were only 2-3 beats per minute apart.Like I said earlier, if you absolutely don't have the money right now for a Fitbit or other device, get this to hold you over. I'm going to upgrade to a Garmin this Christmas.

It charges pretty quick I hooked it up to my computer in about 45 minutes I was fully charged I had to download the app from the App Store it's called HeyBand I installed it and then I I was able to pair it with no problem and i did firmware update from the app and then I changed the settings to my liking and i also like that I can sit alarms and I can see the text messages on it and I like the way you can charge it easier than having to take The Wristband off like some others .it's really good value for what I paid the only thing that lost 1 star for is the brightness I wish it was a little more brighter specially outdoor. I still like it and I would buy it again.

I knew I did a lot of walking. I purchased this just to see if I was right. I was!!!! Over 30,000 steps a day. Not only does it count my steps but I can see who's calling my phone (comes in handy when the phone is in another room) . Also I can read my text I love it.

I love the Karseen Fitness Tracker! It does so much that a smart phone (besides answering calls & sending back texts, but it vibrates with incoming calls and shows texts/emails! I am in the process of losing weight and it’s a great device and app to do that! It is waterproof! It shows steps, plus mileage! It is so inexpensive, but works like an expensive one! I love it, I Love It, did I mentioned that I LOVE IT!