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

Profile and settings

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

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

The splash screen is the logo on a green background

Achievement leveled up modal

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

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

You have 5 lives. When you run out you can wait, practice, or refill by spending crystals

Library and In app purchase to get Tingles Premium

In app purchase of Pacemaker Plus

Buy Ethereum via Simplex

Spin wheel for blitz buy gamification