You can check for an update through the Google Play Store.
- Launch the Google Play Store on your phone: https://play.google.com.
- Tap your profile picture at the right of the search bar
- Choose 'Manage apps & device'
- Under 'Updates Available' tap 'See Details'
- If F-Secure Mobile Security appears in this list, an update is available.
- Tap "Update" and the app will update.
Note: If you want to set your device to automatically update your F-Secure Mobile Security app, choose the menu 
button at the top right of our Play store page then check the box for 'Enable Auto-update.'