DENISY Fitness Tracker,Wireless Activity Trackers Smart Bracelet with Heart Rate Monitors for IOS Android Activity Watch Wristband.

I purchased this to keep track of my heart rate during cardiac rehab. My heart rate is a little high to start with, and I'm not supposed to go over 140 BPM. Both counting manually, and a medical grade blood pressure machine showed my heart rate in the high 130's,(om a walk) this was showing it in the high 80's. I tried making it tighter, looser, tried both wrists, I even turned in with the display on the bottom of my wrist. I am thin and have a very strong pulse, this device proved useless to even come close to monitoring my heart rate. I could understand, for 40 bucks, its not a medical grade device, but to off by 50 BPM is unacceptable. At least Amazon is good with returns.

I don't write a lot of reviews, but I had to do it for this product. I priced the fit but and to get half the features of Denisy fitness tracker you have to spend four times as much. I bought it because it had a pedometer, and heart rate monitor. What I didn't realize is that it connects to you social media and text messages! It also lets you know when you have been sitting around to long and can notify you if you walk away from your phone (great feature). This is a great buy!

I've had this for a few weeks and it worked well until today their new up date version 2.4.5 needs to keep Synchronizing the time. I headed out for my run and was using the outdoor Running mode and around a mile into my run it reset everything back to 0 and continue to do it for the rest of my run, then it started disconnecting my music when it reset . -I'M not very happy at the moment. before this happen I would of given it 4 stars

1st Fitness tracker, so far it's water resistant, it does track some activities but yet another Fitness Tracker that doesn't just generically track fitness training in general. Heart rate monitor is very accurate after a week, for what it does it's a good buy. I would recommend it as a good entry level tracker.

Love, Love , Love this! I tried 2 different Fitbits and antoher brand i can't remember the name of. None of them would hold a charge for longer than a day. I have had no problems with this tracker, easy to use ( I am still figuring out how to use some of the extras). Comfortable AND holds a charge!!!

Finally a fitness watch that works! Loved so much bought another for my partner. Easy to set up. Notificateins with cell are incredible.

Stopped using it after a week. I purchased it to track my sleep and it didn't really track it accurately. In fact, I was awake one night until midnight and the watch said I was sound asleep! I had even got out of bed twice! Not so awesome

The first one I ordered worked for 2 weeks. Then I returned it and bought another one. It worked for 2 months. Now, the second one won't charge or turn on at all. Unfortunately, I am past the time that they will return/ exchange. Don't waste your money on this one!