Updating your Kardena smartwatch's firmware

Firmware updates can improve functionality, fix bugs and optimise the compatibility of your Kardena smartwatch.

Before updating

Before you start the update:

• Charge the smartwatch sufficiently.
• Make sure your smartphone is also sufficiently charged.
• Place the smartwatch near your smartphone.
• Keep Bluetooth switched on.
• Keep the app open during the update.

⚠️ Important:
Don't switch off your smartphone or smartwatch during a firmware update, and don't intentionally interrupt the Bluetooth connection.

Starting the firmware update

1. Open the app for your Kardena smartwatch.
2. Open the device or smartwatch settings.
3. Look for "Firmware," "Firmware Update," or "Device Update."
4. Check whether a new version is available.
5. Start the update.
6. Wait until the process has been fully completed.

During the update

The smartwatch may be temporarily unresponsive or restart automatically during the process.

ℹ️ Note:
An automatic restart during or after a firmware update is usually nothing to worry about.

Failed firmware update

If the update cannot be completed:

1. Charge the smartwatch sufficiently again.
2. Restart your smartphone and smartwatch.
3. Re-establish the Bluetooth connection.
4. Open the app.
5. Start the update again.

⛔ Do not factory reset during the update:
Don't carry out a factory reset while a firmware update is in progress.

Update still not working?

Please contact Kardena Support.

Please provide us with the following information where possible:

• Kardena model
• smartphone model
• Android or iOS version
• app used
• current firmware version, if visible
• error message or screenshot

This will help us narrow down the problem faster.

Updated on: 10/09/2026