Private, local-first Flutter companion for COLMI R12 smart rings — BLE sync for activity, pulse, sleep, SpO₂ and transparent firmware indexes.
android open-source ios privacy ble heart-rate bluetooth-low-energy hrv flutter spo2 activity-tracking local-first qring sleep-tracking colmi smart-ring wearable-health smart-ring-app colmi-r12 oura-ring-alternative
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Updated
Sep 3, 2026 - Dart