Designed for 5-10 minute sessions to fit into a busy schedule. The app is currently split into two main tracks:

. You can access it by tapping your current course flag (top left) and selecting "Math" from the course list. Quick Verdict: Is it worth your time?

Duolingo launched the app exclusively on Apple's App Store (compatible with iPhones and iPads). While Duolingo has confirmed that an Android version is under development, it has not rolled out a wide public release.