Can you explain how to use this app more efficiently to me i really want to learn this

MIT App Inventor Help
1

Please help me understand if an android phone can be used to create an app from This website

2
3

AI2 needs a desktop or laptop computer to code programs.

4

You can use your smartphone to code blocks, but there are some difficulties with the interface, and viewing your work is more difficult. Work is being done on making the phone interface more user friendly.