Spaced repetition-memory cards

Spaced repetition technique. Allows all knowledge to be stored in long-term memory. At the same time spending less time on memorizing. The clue point is that the information must be repeated at certain increasing intervals. So you can learn a large amount of new foreign words, prepare for the exam and much more.

Recent changes:
- The card creation window will no longer close accidentally when tapping on an empty space.
- Slightly increased the card flip speed to make learning more comfortable.
- Added subscriptions – now you can try the features for a short period.