How Revision Works
Codolio uses a technique called Spaced Repetition the same science backed method used by medical students and language learners. Instead of reviewing everything every day, you revisit a question right before your brain is about to forget it.
Here is how it plays out in practice:
- You Revise a question and rate your confidence level.
- The system schedules a revisit. If you struggled, it appears again soon. If you nailed it, the interval is longer because you clearly still remember it.
- When the revisit day arrives, the question appears in your Daily Queue. You attempt it fresh, rate your confidence again, and the cycle repeats each time the gap grows a little longer.
Your Daily Revision Queue
Every day, Codolio selects up to 5 questions from your workspace that are due for revision. These are the questions whose memory scores have dropped the most meaning your brain is closest to forgetting them.
- The queue refreshes every day at midnight.
- Completing all 5 keeps your Retention Rating from dropping and builds your revision streak.
- The queue unlocks once you have solved at least 20 questions in your workspace, giving the algorithm enough history to work with.
You can start or resume your daily queue any time from the Daily Revision card at the top of your workspace.
Confidence Ratings
After solving or revising a question, you rate how well you recalled it. Your rating directly controls when you see the question next be honest with yourself for the best results.
| Rating | Label | What it means | Next revisit |
|---|---|---|---|
| 1 | Struggled | Barely recalled it. Needed the solution. | Very soon |
| 2 | Tough | Got there but with effort or hints. | A few days |
| 3 | Got it | Recalled the approach well. | About a week |
| 4 | Nailed it | Solved it confidently from memory. | Two weeks or more |
Retention Rating
Your Retention Rating estimates how much of what you have solved you could still recall right now like a memory battery that slowly drains the longer you go without revisiting a question.
Two things decide how full that battery is for each question: how confidently you rated it last time (Struggled, Tough, Got it, or Nailed it), and how many days have passed since. A confident “Nailed it” starts fuller and drains slowly; a “Struggled” starts low and fades fast. Your Retention Rating is just the average battery level across everything you have solved.
How memory fades after a revision
Revising a question resets its clock the moment you rate it again, its battery tops back up. Rate it confidently a few times in a row and it will take even longer to fade next time, so it needs fewer future revisits to stay fresh.
A rating above 70% means most of what you have revised is genuinely sticking. Below 50% is a signal to slow down and revisit more often before moving on to new questions.