You earn crystals as you complete lessons. You can buy more from the Shop tab

Bottom sheet for wrong answer

It quizzes you with audio and visual questions to make you understand and to increase recall

Achievement leveled up modal

Profile and settings

The curriculum is arranged linearly as a timeline with tests interspersed in between

During login, it asks for your age, name, email and password

The onboarding asks you select a language and pick a daily learning goal

There are posts by other learners and mini "games" that help you test your skills

Results tab

In app purchase

Upgrade to Pro, start free trial

Spin wheel for blitz buy gamification