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

First lesson complete. It shows your learning minutes and asks you to create a profile

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

Add friends to compete with. You can search by name or find them from facebook

Bottom sheet for wrong answer

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

Gamification badges and progress

You can join language clubs to practice with other learners

Profile and settings

In app purchase to buy track effects

Daily goal complete

Gamification: Places visited

Bottom sheet with total minutes when you complete a session