ProtocentralBuilding a screenless wearable, one thing hits you fast: the app isn't a companion — it's the device.
We built it on Flutter — open source, like the firmware and hardware. From PCB to pixel, no closed layer.
The app (iOS + Android) shows HR, HRV, SpO2, sleep, activity, temp — plus Recovery, Illness Detection, Training Load, Body Battery.
BLE 5.4 GATT on the nRF54L15. Raw data export. Pre-launch: https://www.crowdsupply.com/protocentral/move-ultralight
