Monthly subscription for my app

I am looking for a freelancer who can assist with the implementation of a monthly subscription model for my app. The subscription will include access to premium content, such as exclusive articles and videos. I am looking for someone who can create a low-cost subscription model that will appeal to a wide range of users. I would like to handle billing and payment processing through in-app purchases. The ideal candidate should have experience with subscription models and in-app purchases, as well as a strong understanding of user psychology and pricing strategies.