Unity is what we've used to develop the UI, link our database, and merge them together. This platform also allows us to make builds for both Apple and Android.
SQLite is our database to allow exercises, modifiers, locations, and other aspects of the game to be stored and easily accessed on the phone.
The SQL coding langauge was used for our product in conjuction with our database, because the databse itself will only work using SQL.
C# is our main coding language when developing the game app inside of Unity, due to it's compatibilty with Unity and the Apple and Android phones. It also hosts a large support network, which became useful when researching how to fix errors.