OpenTracks has integrations with several HR BLE trackers: https://codeberg.org/OpenTracksApp/OpenTracks/src/branch/main/README_TESTED_SENSORS.md
OpenTracks has integrations with several HR BLE trackers: https://codeberg.org/OpenTracksApp/OpenTracks/src/branch/main/README_TESTED_SENSORS.md
That's simply not true. The Decathlon HRM Band for example connects to virtually everything that can understand a generic HRM over BLE. And limited in what sense? It's either sending a heart rate or not.