If i am willing to stop an app Monkey Taps what shall be done

Hello Hakhaled, Thank you for using Apple Support Communities! It sounds like you need some help unsubscribing to a app. We would be happy to help!

If you are paying for a subscription that you are getting billed through Apple here is how to cancel the subscription if you no loner wish to continue using it: How to cancel a subscription from Apple.

Try the steps outlined in the supported article, and if you encounter a problem while trying to cancel please see Subscriptions and Billing. Cheers!