Review on 📱 TOZO S1 Smart Watch Bluetooth 5.0 Activity Tracker with Heart Rate Monitor, Sleep Monitor, Pedometer, Calorie Counter & IPX8 Waterproof - 1.54-inch Touchscreen Compatible with iPhone & Android Phones by Robert Sorrells

This was my first smartwatch. I would compare it similarly to my wife's Fitbit. However, the graphics are more similar to their Apple Watch. Battery life is pretty good - I wore them 24/7 for 5 days before they ended up in the same band on the sixth morning. It charges from this fully discharged state in approximately 45 minutes using the included magnetic charger. It is equipped with a heart rate monitor, step counter and sleep monitor as well as the necessary watch functions including a timer. There's a mobile app that connects to the watch via Bluetooth, and the watch will download data when it's within Bluetooth range of the phone or tablet. The application has pages for various functions for which daily schedules are created. You can view all days uploaded to the app by time. The clock is responsive, the screens change quickly. It's surprisingly thin and big enough to be worn by both men and women. The bracelet is made of nice, soft silicone. Comfortable to wear at all times. Caveats: Nothing bad to say, this is a new product with version 1.0.0 - the first version. * When the watch downloads data to the mobile app in the morning, it doesn't download the sleep data first - it downloads it a few hours after you wake up. At first I didn't know this and thought that something needs to be restarted. Mobile application restarted - no download of sleep data; restarted the phone - no download; Watch restarted - the sleep data from the watch has been cleared. Now I know better. * The alarm function seems to be still under development, it only says "no alarm". I tried to set an alarm on my watch; still no change on smartwatch display. * The stopwatch function also has a countdown timer. The caveat is that they must stay on top; If you switch to another function, they stop and have to be restarted when coming back. My weight and height with metric numbers then change to imperial measurements, it correctly converts my height to inches but the weight converts to 47.2 LiBS. This is clearly not true, I weigh about 225 pounds. I'm pretty sure it's just a conversion factor error in the mobile app code. I wrote to the manufacturer and reported the error. Basically I like the watch. I have several other Tozo products and this seems to be the company that "knows about it". I'm a retired mechanical engineer and I'm usually a little impressed with the quality of development at this company. They seem to be better than most productions we've seen in China in the past.