I builded a simple ToDo app with a registration form, but, the app apears as a shared app, not as a personal app .Everybody who has the app can see all tasks that another person put on it. How can a made it as a person app?

Hello Gabriel.

Do you have login on the app?

And each task has a UserId on it?

And your list screen filters by logged user?

If you do all 3, it will work. If you missed one, it won't.