Bests & Worsts Reviews from Amazon

UPDATE: The battery lasted 7-1/2 days...exactly half the advertised length. Again, I'm not complaining about the 7 day life. Compared to my Apple Watch, it's downright good! But if you're going to advertise 15 days, you should deliver something close to that. Oh, recharged in 2 hours, as advertised, so that's good. I'm going to shut off all the cool features of the watch and see how long the battery lasts. Should be 25 days, according to Amazfit. I'll report back with my results. In general, it's a fun watch with smartwatch features for not a lot of money. Notifications for calls, texts, and other apps work reasonably well. The "health" features of the watch leave a lot of room to be desired. I have an Apple Watch. It does very well compared to actual medical measurements. The Amazfit falls short in just about every category, especially SpO2, at which it performs abysmally. If the "health" features of this watch worked correctly, it would be incredible. For the price, you can't (and shouldn't) expect much. In other words, if you really need to know what's going on with your body, don't depend on a forty dollar watch. Do I recommend? I give it a solid "meh" ... three stars. Good at some things, poor at others. Definitely usable at its price point. Without further ado, here are some specifics... Let's start with the PROS. - Size/weight: you hardly know it's there. - Readability: surprisingly good for such a small display; colorful, too. - Water-resistant: can wear when showering and swimming, so that's a plus. - Features: plenty! - App: also surprisingly good considered the price point for the watch. - Alerts: obvious and customizable. - Bands: decent, cheap (that is, inexpensive), and easy to switch out. - Alexa integration: it works. For simple stuff, it's nice. - Steps accuracy: within 5% of my Apple Watch and my manual count. - Watch faces: many to choose from within the app, and many many more from 3rd parties. Now for the CONS: - Battery life: nowhere near what is advertised. After six days of constant wear, I'm down to 26%. Yes, most of the features are on. The lift-to-view is turned off for 8 hours a day. I expected 15 days--I'll get half that, at best. (NOTE: I'm not upset about the battery life as it is still much better than my Apple Watch--just not what was advertised.) >> Also, when I sleep, the red and green LEDs are on all night long. They appear to have something to do with sleep quality? Anyway, that is a clear and obvious drain on the battery. - SpO2 accuracy: not very good at all--can't trust it. I have a pulse oximeter. My SpO2 is normally 97-98%. Best the watch ever gave me was 93%. This is a complete fail. - Heart rate accuracy: mediocre. Usually off by more than 10% compared to my wrist sphygmomanometer. Not horrible, but not trustworthy if you really need to know your heart rate. - Sleep accuracy: not horrible. Seems to estimate the total length well, but the sleep quality doesn't match my other devices. Again, good for a rough idea, but don't count on it. - What is the PAI and why do I care? PAI is "Personal Activity Intelligence". Search for it for more information. It's complicated. I never got my PAI score above a six. Goal is 100??? Is the watch even on the same scale? Who knows??? ---End of Review---