The Amazfit GTR Lite 47 mm is very similar to the previous version of the Amazfit GTR 47 mm. They have the same stylish design, 1.39-inch touch screen, 24 days battery life, BioTracker PPG optical heart rate sensor and 5ATM water protection.
The strong competition from the Apple Watch and the Fitbit Versa means that despite the slight (ed: strong) price advantage, the small foibles of the Amazfit Stratos get highlighted even more. Source: Huami Amazfit Stratos Review: Foundations in Place, But Justifying One is Tough
With a battery life measured in weeks, fitness tracking, sleep monitoring, GPS, and more, can the $99 Bip beat the Apple Watch? Source: Amazfit Bip Smartwatch Review: Taking The Casio Approach To Beating The Apple Watch