If there’s no heart rate data for a specific period or an entire day, please try the following steps.

1. Reset the Auto Measurement Mode timer: There may be a temporary sync mismatch between the ring’s internal measurement timer and the app settings. In the app, go to [My Page] > [Auto Measurement Mode], temporarily change the measurement interval to a different mode, reset the device (disconnect and reconnect), then restore the desired mode.

2. Check the sensor lights: When an auto-measurement cycle begins, check that the green LED inside the ring lights up properly.

3. Adjust the wearing position: If the sensor is positioned over a knuckle or another bony part of the finger with little flesh, blood flow measurement can be difficult. Move the ring slightly so the sensor sits on the soft inner part of your finger.