For iOS, you can use touch ID (as well as Face ID in your supported device) to access and secure your Qapital account.
Head to the Home tab and tap on the icon in the top left corner. From there, tap on the gear icon in the upper right hand corner, select "Security & Password," and then you'll see the toggles for a passcode and face ID.
For Android, go to the Home tab and click on the gear icon in the upper right hand corner. From there, click on Settings, and then click on "Security & Password," and then you'll see toggles for a passcode and biometrics.
Please note, you may need to enable a passcode first in order to unlock this feature.