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

Duolingo

Learn Spanish, French and more

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

More interactions from‏‏‎ ‎

Duolingo

Duolingo Plus lets you download lessons offline and removes ad. You can start with a 7 day trial
It quizzes you with audio and visual questions to make you understand and to increase recall
You can tap the country flag on top to add more languages and switch between them
Achievement leveled up modal
The splash screen is the logo on a green background
There are posts by other learners and mini "games" that help you test your skills
First lesson complete. It shows your learning minutes and asks you to create a profile
The curriculum is arranged linearly as a timeline with tests interspersed in between

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