- Banglejs has GPS but is big and has no established HR or step counting algorithms - PineTime is more Apple-like, but the firmware is less mature and has no GP

- Banglejs has GPS but is big and has no established HR or step counting algorithms - PineTime is more Apple-like, but the firmware is less mature and has no GPS - TTGO T-Watch has no HR sensor AFAIK, but some versions may have GPS (see https://github.com/Xinyuan-LilyGO/TTGO_TWatch_Library https://github.com/Xinyuan-LilyGO/TTGO_TWatch_Library) - TTGO T-Wristband is like Miband but has no HR sensor again Of course, you could buy an Android watch or an Apple watch and program your own apps.