Hi dear,
Welcome to the 
odular community!
What do you mean exactly?
Of course, in the Monetization > Advertising section you’ll find _Rewarded components that are exactly what you need, as they require the user to watch an ad.
It will obviously take some effort and study to build an app like this from scratch, so I’m sharing a famous message from Taifun that can give you a good starting point to get into block-based coding.