The ideal way of building Apps using the MIT App Inventor platform is building your App on your computer, desktop or laptop, and testing it in real-time on your tablet or phone.
Your computer and device must be on the same network for live testing to work. Some network configurations may prevent live testing. Please check with your network administrator if you experience an issue.
MIT AI2 Companion
On your Android device, open the Play Store App and search for MIT AI2 Companion from the MIT Center for Mobile Learning. Click on Install.