From their website:
- a game-based and structured curriculum optimized for English-speaking beginners;
- compartmentalized contents designed for studying in fragmented times;
- an innovative way of breaking Chinese characters down for new learners;
- multiple test modes that strengthen memorization and personalize learning;
- a gentle voice with native pronunciation at two speeds covering all contents;
- the option to learn simplified, traditional characters or both on demand;
- synchronization of learning progress across devices.
Note: I have not tried this app myself, so if you have please let me know what you think about it!