I would not classify this as a smart watch but more of a smart fitness tracker. For the price, this is an excellent product, but if you are looking for an Iwatch replacement, this is not it. But you are not paying $300-500 either. I am using the bip with an iphone 8 and synching has been no problem. Steps have been fairly accurate compared with a fitbit charge hr. Heartrate monitor appears accurate but does seem to have a minium rate locked at 46 bpm. Sleep monitoring is accurate, if you go to bed between 8pm-6am. I work 3 rd shift 3 days a week, and sleep monitor will not record if going to bed after 6am. You can manually put in your sleep hrs in app, but that is not true sleep monitoring. As every review has stated, battery life is great. For a basic beginner tracker, the bip is excellent all in all.Most reviews list pros and cons, but I am going to stick with the cons so a buyer knows what they are not getting.Cons. Military time watch faces. Unless you download an analog hand watchface, or a select few digital faces from amaztool app, the watch software does not allow to switch from military time to 12hr time. Sleep monitor. If you sleep other than � normal hrs, watch will not monitor sleep. In otherwords, if you are a day sleeper, forget sleep monitoring. Again, should be a simple software fix, so stay tuned for firmware update. Weather display. Depending on watchface chosen, you may only receive hi-lo forecast for day as oppossed to actual temperature. Again another software issue that is very correctable by firmware update. Calorie burn. Not a big deal for me, but if you are one tracking calorie burn with your fitness, this is waaaay off. Heartrate minimum. I have a very low sleeping heartrate verified medically, so having a minimum set at 46bpm, I do not get a true low reading on my avg heartrate. This is a minor complaint as very few people drop below that 46 level.With all being said, for a $80 smart tracker for a beginner wanting to get their feet wet with a fitness tracker, the bip is worth the purchase. If you are looking for a true smartwatch, you will need to breakout your wallet and spend much more. I like mine, but will probably keep my eye out on the pace or stratos. If they just put a little more effort in their software across all lines, they will have some excellent products across the board. Having iphone, it is very difficult to find a good tracker with these features without spending a ton of cash.