Why don’t my laps register?

It could be two things; bad GPS signal or invalid Start/Finish line placement. Check for bad GPS signal: Open your session and tap the round “Route” button to open analysis …

Which heart rate monitor (HRM) should I buy?

RaceChrono currently supports all Bluetooth LE (or Bluetooth Smart) heart rate monitors, that follow the HRM profile defined in the Bluetooth standard. RaceChrono is currently being tested using the Suunto …