The Amazfit GTR Mini connected watch is on sale on AliExpress for less than 130 euros. With its large 1.28-inch AMOLED screen, it clearly shows you the information you need.
The watch measures your heart rate, can also give you your SpO2, and monitors your stress levels. It can also track up to 120 sports, to give you complete balances of the number of calories burned, and it is waterproof up to 5ATM. The design of the watch allows it to be worn daily, with any outfit.