SuperMemo 2 flashcard application

An iOS flashcard app built to investigate spaced repetition theory and how it can affect language learning. The app uses SuperMemo2 algorithm to schedule card reviews.

How card reviews are scheduled

1. All new items have an Easiness factor (EF) equal to 2.5.
2. The items reviewed are assigned the following intervals:
3. I(1):=1.
4. I(2):=6.
5. for n>2: I(n):=I(n-1)*EF. Where i(n) is the interval after the n-th repetition.
6. After each repetition the user response is scored in 0-5 grade scale.
7. the new EF for the item is determined according to the formula: EF’:=EF+(0.1-(5-q)*(0.08+(5-q)*0.02)) (q = user score)
8. If the user score was lower than 3 then the EF won't change and the item will be considered as if it was being memorised for the first time.

SuperMemo2 algorithm: https://www.supermemo.com/english/ol/sm2.htm

To Do

• Improve card editing and searching
• Intro tutorial
• Allow for rich content in cards
• Data synchronisation
• iPad support