Garageband is a great app for iPhone that lets you create and play music. You can create songs, albums, and even mix and match tracks to create a custom mix. You can also use the app to control your music with your iPhone’s touchscreen. There are a few ways to loop in Garageband for iPhone. The first way is to use the “loop” button. This will play the last track on your album or song in reverse, so you can keep playing it back over and over again. The second way is to use the “reverse” button on your touchscreen. This will play the first track on your album or song in reverse, so you can keep playing it back from the beginning. The third way is to use the “random” button on your touchscreen. This will play a random track from your album or song. The fourth way is to use the “play all” button on your touchscreen. This will play all of your tracks from your album or song at once.