If you like the idea of learning to compose music on your phone, your go-to app has typically been GarageBand on IOS. But what if you're rocking an Android phone and would rather not switch? Don't worry, you're covered. Open Labs has released a pocket-sized Android version of Stagelight, its music-making app. It's free to get started, and includes lessons that help you write your first tracks. You pay only as you expand your talents -- like with GarageBand, there's an in-app store that offers more samples and extra features. While you probably won't produce a hot track solely on your phone (you can sync with Stagelight across devices), this could be what you need to either understand the basics of music or make a rough cut that you can polish later.