The short version
Each task you complete in practice mode goes into a queue. We track how confidently you answered. The next time you see it depends on that:
This is the SM-2 algorithm — same one Anki uses.
Reading the Review queue
The dashboard shows how many items are due *today*. Aim to clear it daily. If the number gets above 50, slow down on new topics until it shrinks.
What if I miss days?
Nothing breaks — items just pile up. Clear the backlog before adding new topics, otherwise you're studying without retention.