Number add error in label


I want to add no 1 in label when someone sees ad on my app
means text on label box is 10. when a user watches a video ad then label must be 11
i have tried a label for this purpose
please suggest me


Sounds like an earning app and those are not allowed.


i want to ask that if anyone clicks on a specific button in my app the number in firebase should change from 19 to 20

means an increment of 1 will be done in firebase and my app should show overall result


i know it can be done but dont know how?

please guide me about this.