Spaced repetition timer. Come back and see what stayed.
Yesterday’s topic feels familiar. A week later, the missing pieces are easier to spot. Use this timer for the review you planned, then choose when to return.
Today’s timer is a session boundary. Your calendar holds the spacing.
Your local timer
A small return visit
Time today’s review. Schedule the next one in your own calendar.
Stage labels show the default plan. Finish a stage to prepare the next, or Reset to change stages and duration.
ReviewCounting down
10:00
Start with older material before opening today’s notes.
Ready when you are. Nothing starts automatically.
Choose 1–180 whole minutes before starting.
No saved sessions. No effect on your workspace timer. Leaving or reloading clears this clock. Completion is silent.
Two different kinds of interval
Spaced repetition involves gaps between encounters with material. A review timer measures the minutes inside one encounter. This page handles that second job. It does not run for days, send reminders, or choose when a card is due.
Open the material that your own plan or flashcard app says to review. Try the questions before reading the answers. An old topic may take only a few minutes; a stubborn one may need a worked example and another attempt.
Let the difficulty inform the next visit
When an answer comes back easily and you can explain it, you may choose a longer gap next time. When it does not, write down what needs repairing and plan an earlier return. There is no universal day-one, day-three, day-seven schedule that fits every learner and every topic.
If you already use a flashcard scheduler, keep using its due dates. The local countdown is simply a way to protect a manageable review window. Finishing the clock does not mean you must clear the entire deck.
Leave a better note than “review chapter four”
The last two-minute stage is for a practical handoff to your future self. Note the exact question, the source you checked, and the next date in a place you will actually see. A short note such as “Friday: draw the stages without labels” is much easier to act on than a broad reminder to revise.
Before you start
Does the timer schedule spaced repetition?
No. It times a single review session. Use a calendar, notebook, or flashcard scheduler for dates and reminders. Reloading this page clears its timer.
Can I use it alongside Anki?
Yes. Open your existing deck separately and use this page to bound the review session. There is no Anki integration, card import, account connection, or change to your deck.
What if I miss a planned review?
Choose a manageable set when you return, check what you can still explain, and update your plan from there. This tool has no overdue counter or streak to repair.