MIT app inventor is an app that allows you to code, create, and design your own app from scratch.  You can  watch videos on how to make certain apps or you can try to make your own. We built a multi app because it is better to download one app that has more stuff in it instead of one app that only has one thing and if you want to play more you would have to download more apps. This makes having a multi app better. The four main beginning apps are Hello Codi, Ball Bounce,  Talk To Me, and Digital Doodle.