DCS RankWhat it is
You can't revise what you've forgotten you knew. Forgotten concepts watches how fresh each learned topic still is, gives every one a freshness bar, and pushes the ones nearest the edge to the top of a short, honest review list — so a five-minute refresh saves a hard re-learn later.
Live demo · Forgotten concepts Sample student
Mole concept Physical Chemistry
Due nowMendelian ratios Genetics
Due nowRotational motion Mechanics
SoonAldol reaction Organic Chemistry
FreshElectric field Electrostatics
FreshTop of your review list
Mole concept is fading fast — review it today before it costs you in a mock.
These two topics are right at the edge of slipping. A few minutes each now resets their freshness and keeps them exam-ready. The fresh ones can safely wait — no need to revise everything every day.
How it works
1
Note what you learned
Each concept you've practised is tracked along with when you last got it right.
2
Measure freshness
A freshness score falls over time, faster for concepts you find harder.
3
Rank by urgency
Concepts nearest forgetting rise to the top, labelled due, soon or fresh.
4
Refresh and reset
A quick review on a due concept resets its bar and clears it from the list.
What you get
✓A short, ranked list of exactly what to review today
✓A freshness bar for every concept, so nothing slips silently
✓Permission to skip the fresh topics and save real time
✓Old strengths kept alive instead of quietly forgotten
See what's due for review
Take a free mock and your review list starts forming after the first attempt. No card needed.
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