You need a purchase and subscription page. The content of the advertising premium service is not good in terms of design that will be monthly - 3 -month - 6 months - 6 months and annual packagebe . Are there any people who will make this type of screen free of charge and offer them to beginners?
That’s a great offer! You want a subscription model for your app where you will earn money 
, and people 
will make this for you free of charge. Do you think it will happen, no never, you need to pay to the developer for making such things where you will earn.