The Amazfit GTR 3 is equipped with a 1.39-inch screen, while the Amazfit GTS 3 has a 1.75-inch screen. Amazfit GTR 3 Pro’s proportion of round watch screen has been increased to 70.6%.
This series of smart watches supports over 150 modes. While the user is exercising, the watch can track the user’s heart rate, including if the user’s heart rate is too high. The watches also have interval reminders and other functions so as to reduce risk while exercising… More here.
My experience with Amazfit devices has been very positive and the pricing is extremely competitive. These looks like a natural move up for the range.