YAMAY SW023 Smart Watch for Men Women Blood Pressure Monitor Blood Oxygen Meter Heart Rate Monitor, Compatible with iPhone Samsung Android Mint-Green

I bought this watch based on a review of basic affordable watches that provided heart-rate and blood pressure measuring, with the oxygen meter as an added bonus. If that is what you are looking for then this is an excellent watch and is best compared to a standard digital watch with those health functions built in that happens to have some psuedo-smart watch capabilities as an added bonus. The companion app is great for logging your health readings and the watch will automatically track your heartrate through the day or when you request it via the watch itself. The blood oxygen and blood pressure readings are on demand and not done automatically due to requiring you to remain still, but will populate the app's graphs with the data resulting from your requesting measurements of those things. It also tracks your sleep, light/heavy sleep periods based on movement, and can be an interesting way to track periods of waking or trips out of bed. The battery life is outstanding also, but this is partly due to the screen only being on when you wake the watch, or via the inbuilt motion sensor auto on function, though I disabled that since arm movement tends to trigger that even on expensive smart watches. That said there are 2 cons. (Android specific, unsure if this is the same for iPhone) -Firstly for some reason in order to synch the data from the watch into the app(this happens automatically when you open the app if the watch is paired), it requires you to enable location on your phone during the synch but it can be disabled once again after the synch is complete. The watch will store up to 7 days of data internally and needs to be synched to the phone during that period to offload the data into the app. -Secondly if you are buying this planning to receive a fancy smart watch. This is best thought of as a standard generic digital watch with quality health check capacity that happens to have some smart watch features as a bonus, and not as a standalone smart watch itself. If enabled it will notify you of calls and texts but not the full suite of android notifications, though it does have the option for facebook notifications strangely enough. It can also play/pause music and move forward/back in your music playlist but with no readout onscreen of what track is playing. Personally I rate it a 10/10 I got exactly what I needed and wear it on my offhand while my Pebble Time Steel smart watch is on my main wrist for smart watch functionality.