…other applicatios, that are allowed to ‘paint on other apps’ (like fb messenger for ex.) can capture sensitive details.
If you switch back to Rev within less 50sec the app doesn’t ask for your passcode. If you close/switch app from more than 50sec then it requires your passcode.
I was about something like this: http://stackoverflow.com/questions/28606689/how-to-prevent-screen-capture-in-android
Your app does not have this feature, so card details are not safe