https://gadgetbridge.org/gadgets/wearables/yawell/
A free and open source Android application for bluetooth devices.
colmigadgetbridge
https://codeberg.org/Freeyourgadget/Gadgetbridge/issues/5193
Gadgetbridge - A free and cloudless replacement for your gadget vendors' closed source Android applications. See the list for supported devices.
colmismartwatchgadgetbridgecodebergorg
https://codeberg.org/Freeyourgadget/Gadgetbridge/pulls/5263
Gadgetbridge - A free and cloudless replacement for your gadget vendors' closed source Android applications. See the list for supported devices.
colmiinitialsupportgadgetbridgecodeberg