Revision Ledger
Subject Study Tracker
Track and balance revision hours across your whole curriculum with a session ledger and Focus dial view.
Study & Revision
Revise like it's exam day.
A subject tracker, active-recall Pomodoro and an exam-hall countdown clock for GCSE, A-Level, AP and university students. Free to use, distraction-free, and works offline.
- No popups
- Screen wake lock
- CSV export
- 100% private
IN PROGRESS 60 MIN PAPER
60:00
Write steadily — pace by markMCQ or essay paper
- 01Pick a modeTracker, Pomodoro 25/5, exam countdown or custom.
- 02Set your subject or paperAdd curriculum subjects, or set the exact paper length.
- 03Run it hands-freeSpace to start, R to reset, L to log a session.
- 04Review the ledgerSessions are saved locally; export to CSV.
The complete toolkit
Pick your study mode
Quick guide
Which timer for today's revision?
| Timer | Timing | Best for | Sound | |
|---|---|---|---|---|
| Subject Tracker | Count up / down | Balancing hours across subjects | Session chime | Launch → |
| Mock Exam | 15m & 5m warnings | Past papers under exam conditions | Exam gong | Launch → |
| Pomodoro 25/5 | 25m / 5m × 4 | Flashcards, problem sets, recall | Desk chime | Launch → |
| Custom Timer | 1 – 480 min | Essays, theorems, deep topics | Session chime | Launch → |
Built for students
No paywall. No popups. No account.
Many study apps lock tracking behind subscriptions or bury you in gamified ads. oTimers keeps your revision logs in your browser's localStorage, runs on hardware timestamps (performance.now()) with Screen Wake Lock, and works fully offline in libraries with spotty Wi-Fi.
- Local-firstLogs never leave your browser
- Wake lockScreen stays on mid-paper
- No popupsNothing breaks your focus
- Works offlineSynthesised audio, no downloads
Student FAQs
Questions, answered
Are my logged study sessions saved if I close the browser?
Yes. Sessions and cumulative subject times are saved in your browser's localStorage. Your data stays private, never leaves your machine and needs no account.
Can teachers project the exam clock in a real exam room?
Yes. Press F for fullscreen. The high-contrast numbers and dial sweep are legible from the back row, and Screen Wake Lock keeps the display awake.
How do I set a 2-hour or 3-hour exam paper?
Use the Custom button on the preset bar and enter your paper duration in minutes, e.g. 120 or 180.
Can I export my revision log?
Yes. The session log has a CSV button that downloads dates, subjects, timestamps, durations and your notes.