iPhone · Android · web

The app

Lessons with the screen off. Download a level and play it anywhere.

The apps are not in the stores yet. Until then, the web lesson works on any phone, and the web app on desktop.

What it needs

iPhone and iPad

iOS 16.0 or later. Plays with the screen locked.

Android

Android 9 (API 28) or later. Plays with the screen locked.

Desktop

The web app runs in any current browser. Nothing to install.