Does anyone have an app that wins by just leaving the screen on/ad running?

Good morning everybody!
I wanted to know if you recommend any app that doesn't require so much interaction - whether it's to leave the screen on, some ads or music, easy reading, anything like that that you can do without paying too much attention haha.
I live outside the USA, so it needs to be an international app and you can receive it via PayPal.
Thanks!!