This app has been updated by Apple to display the Apple Watch app icon.

- Now all questions and game modes are free and available immediately.
- Many new features (tables, stars) and improvements in game mechanics.
- Translation into Danish language.

- Now all questions and game modes are free and available immediately.
- Many new features (tables, stars) and improvements in game mechanics.
- Translation into Danish language.

- All acids and ions are available for free, including the "Difficult" mode

- Minor bugs fixes

- 30 acids and 30 ions/salts are available for FREE for those who solved Acids 101 and Ions 101
- German, Spanish, Italian, Portuguese, French, and Swedish Localizations