App version
You can find the latest version of the Casambi app in the App Store and Google Play Store. You will see if a new update is available for the app.
Firmware version
You can see the latest firmware version by clicking "Nearby Devices" and the latest firmware available appears at the top of the screen.
Note: Firmware updates are not security updates, but enable new features. It is not necessary to update the firmware if all the desired features work as they should. It is also important that all units in the network have the same firmware version.