The Huami and Amazfit brands aren’t household names, but they’re very well-known among people who have done some research when looking for a smartwatch. The Amazfit Bip by Huami features a beautiful display, all-day heart rate tracking, sleep tracking, iPhone and Android compatibility, and a shockingly affordable price tag. Most incredibly though, it has battery life of up to 30 days on a single charge.
Source: Best Smart Watch