Build me a mobile app

Existing apps that transfer mobile apps to SD card are inadequate in my experience. In particular, the user generally has to select the apps that they want to transfer to the SD card one-by-one. In addition, I have found that apps are transferred back to the phone storage when apps are updated – meaning that the user has to once again manually transfer all their apps back to the SD card when updates have occurred. I want to automate this transfer process to the SD. This mobile app will automatically loop through and transfer all apps that can be moved to the SD card, to the SD card (or via a user-specified check-list if the user doesn’t want all transferred to the SD card). This transfer process can be scheduled by the user to automatically occur every day for example, or triggered automatically to run whenever updates to apps have occurred. The app needs to have a simple and easy to understand user-interface, something that is lacking in current apps available. The free version of the app will have ads, while the user can optionally purchase an ad-free app.