Thunkable Functionality/database set up

I have created an app in thunkable (design only) and now I am looking for someone to configure all the back end of it. It is very similar design to Hyperice app so use that for reference. Essentially the app needs to play a video along side a timer which will have multiple steps. All of the functionality can be seen within the hyperice app. The app must be functional in IOS and Android. We will work closely together so I can have an understanding of what is being set up.