Well, look what I just found on AliExpress: https://aliexpress.com/item/4000527495064.html https://aliexpress.com/item/4000527495064.html It looks like ESP32

Well, look what I just found on AliExpress: https://aliexpress.com/item/4000527495064.html https://aliexpress.com/item/4000527495064.html It looks like ESP32 + display + real-time-clock + gyroscope/accelerometer/compass + battery + buttons, all inside fitness tracker body. Just waiting for whatever you can code it into