AppInventor Magic

Tell any friend to pick a number from 1 to 31, but not to tell you. Ask your friend in which of the 5 columns is the number he thought of. Once I tell you the columns where the number is, you can guess it.

A demonstration that with AppInventor you can make applications with a very professional appearance.

LANGUAGES: English, Spanish, German, French, Italian, Portuguese, Chinese, Korean, Japanese and Russian.
Intermediate level.
PERMISSIONS: None.

:::: Enjoy the application without advertisements ::::