If your device supports biometric authentication, you can enable biometric login.
Supported biometric features:
Apple: Touch ID and Face ID
Android: Fingerprint (Face ID currently not supported)
How to set up biometric authentication
From the mobile app:
On the home screen, select your profile icon in the top corner
Go to Settings
Go to Privacy and security
Go to App security and switch on (depending on your device and app version) Face ID, Touch ID or biometrics to log in and auto-lock the app
Auto-Lock security
You will need to also enable Auto-Lock security as an additional security measure. It'll ask you for biometric authentication (if you choose biometric instead of passcode) after 5 minutes of inactivity.