My friend told me about this app and you can use it when your phone is off Murtaza k:
The Title starts out being "Screen1", which is what you used in HelloPurr.
This tutorial introduces the following App Inventor concepts:
Loren Lima It's fantastic
Before starting Make sure your computer and your phone are set up to use App Inventor.
Touching the Wipe button should clear your drawing.
You should now have three buttons, one above the other.
Scan the Sample App to your Phone Scan the following barcode onto your phone to install and run the sample app.
Using meaningful names makes your projects more readable to yourself and others.
The interface and the design is pleasant to the eye and easy to use.