fitness app

I'm looking for an experienced team to develop and create a fitness app for me. The app should have the ability to employ an aggregator model where it allows users to search nearby gyms, book a slot and go there and check-in and check-out using QR code. It also needs to deduct money from a digital wallet of the user based. The app needs to be deployed on both iOS and android using React Native as I have some prior experience with it. And I already have a design in mind for the development of the app.