When does Cardiogram collect heart rate data?

Cardiogram collects your heart rate data based on how often your wearable device measures it and how frequently that data is synced to your phone and cloud account. Here's how it works for each device type:

Apple Watch

• Measures heart rate at random intervals based on activity

• To increase frequency (about every 5 seconds), open the Cardiogram app on your Apple Watch and turn on Continuous Mode

• The Cardiogram app does not need to stay open on your watch or phone for data collection to occur

Wear OS and Galaxy Watch 4 or newer

• Use the Cardiogram Wear app on your watch to customize how often data is collected

• To get more frequent readings, enable Workout Mode within the Cardiogram Wear app

• Some Wear OS devices may reduce frequency in the background unless the app is opened regularly

Fitbit and Google Pixel Watch

• These devices measure heart rate about every 5 to 20 seconds

• Cardiogram receives data after it syncs to the Fitbit app on your phone

• Keep your phone nearby to allow auto-sync

• If data does not appear or is delayed, try opening the Fitbit app manually to trigger a sync

If you're still missing data, this article can help.

Garmin Devices

• Garmin watches usually measure heart rate about every 15 seconds

• Data becomes available in Cardiogram after syncing to the Garmin Connect app, which uploads it to Garmin's servers

• Sync delays are common, so you may see heart rate data appear in Cardiogram a little later

If you’re not seeing data from your wearable, make sure syncing is complete in your device’s companion app first. Still need help? Reach us at [email protected]