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

You can tap the country flag on top to add more languages and switch between them

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

Duolingo Plus lets you download lessons offline and removes ad. You can start with a 7 day trial

Asks you to select a daily goal and then notification permissions

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

Achievement leveled up modal

You can join language clubs to practice with other learners

The splash screen is the logo on a green background

Spin wheel for blitz buy gamification

Daily streak touchpoint on homepage

Collecting GO Points as gamification

Checkout experience