Study app for students · Windows, macOS, Linux
Invigilator turns your computer into a quiet exam hall. It closes the apps that eat your evenings. It keeps your phone face down on the desk. It hides the answers until you've actually done the paper. Then it rewards you for it.
Every finished session earns a stamp. Fill the card, claim a break pass or a real-world reward.
Section A · How it works
Five steps from "I'll start in a minute" to a verified, stamped sitting. You can use as much or as little of it as you like: a timed focus block works on the free plan.
Choose a subject, a past paper or just homework. Pick a study mode (Paper, Coding, Essay writing, or one you make yourself) so the tools you actually need stay open.
Everything on your block list (games, launchers, Discord and friends) closes for the whole session. The browser extension blocks feeds, Shorts and the "answers" tab you were definitely not about to open, while normal study links keep working. Want it stricter? Turn on strict mode and anything you haven't approved closes too.
Scan a QR code and your phone becomes part of the desk. Pick it up, switch apps or walk off with it and the timer pauses, an alarm goes, and thirty seconds get added. Need it for a minute? Use a phone break pass. Works in the browser on any iPhone or Android, no app to install.
Photograph your pages with your phone, or write on the built-in canvas with a stylus. Every page carries the session code, and the app checks there's real handwriting on it before the mark scheme unseals. The mark scheme (the official answers) stays sealed until then. No more "I'd have got that one".
Your script and the mark scheme sit side by side. Every dropped mark asks for a reason and a topic, which feeds a weak-topic radar that tells you what to revise next. Then you slam the examiner's stamp and open a sealed supply envelope.
Total for Section A: 16 marks · Turn over
Section B · The cozy bit
Your desk gets a pixel-art window, a pet that grows the more days you study, and lo-fi that's generated live on your machine. No ads, no autoplay rabbit holes.
Feed your pet on days you study. It goes from baby to fully grown over two weeks, with 20 breeds each and rare looks that turn up when you least expect them.
Eleven genres from jazzhop to chiptune, plus rain, brown noise and café murmur. Turn the drums down, push the vinyl crackle up. It's all made in real time, so it never repeats the same loop.
A Pomodoro timer (focus blocks with short breaks) with vinyl, nixie and split-flap clocks. Your breaks unlock five short minigames that pay a few credits, so a break doesn't turn into an hour of scrolling.
Exam Booklet, Glass, Sakura, Kyoto, Midnight Rose, 1970s Mainframe and more. Plus desk sounds from mechanical keyboards to a retro arcade cabinet.
Section C · Rewards
You earn study credits and stamps by finishing study sessions, so they actually mean something. Nothing here is bought with real money.
| 25 min × 1.2 verified | 30 |
| Past paper self-marked | +25 |
| No phone pickups | ×1.15 |
| Streak, 1 day | ×1.02 |
Spend them on themes, pets, clocks, scenes and sound packs, or save up 1,500 for a day of Pro for free.
Each sitting drops a sealed envelope. Most hold credits; some hold collectibles, from Standard all the way to Archival.
For parents
If your parents need convincing: Invigilator can produce a verified progress report as a PDF, with hours, scores and a tamper-evident receipt chain. Parent mode puts settings, the shop and the emergency exit behind a PIN.
Tip: the Plan page writes the "can you get this for me" message for you.
Privacy
Section D · Pricing
Starter
£0forever
Everything you need for focused homework every day.
3-month pass
£9.99one-off
Built for mocks and the summer exam term. Doesn't renew.
Student lifetime
£19.99forever
Pay once, keep Pro from GCSEs through uni.
No bank card? Earn Pro by studying: 1,500 credits unlocks 24 hours, 6,500 unlocks a week.
Section E · Questions
No. It only checks which apps are open on your own computer, so it can close the ones you blocked. It sends nothing to anyone: no account, no server, no tracking. The phone link talks straight to your computer over your home Wi-Fi.
Yes, always. You can finish normally once a quarter of the time has passed. Before that there's an emergency exit. It asks you to type a random 500-character string exactly: no pasting, no backspace, one typo and the line restarts. It's always possible, it's just annoying enough that you'll usually finish the paper instead. Guardians can switch it off.
No. Both are optional. The free plan is a solid distraction blocker and timer on its own. The extension makes website blocking reliable; the phone link and photo scanner are part of the paid passes.
No. Study modes decide what stays open, and anything with unsaved work, like Word, Notepad or your PDF viewer, is left alone. Strict mode is opt-in.
Any. Add your subjects with their board and dates, and it sets grade boundaries and exam countdowns for you. There's a built-in directory of past-paper sites for GCSE and A-Level too.
Only if you, or they, turn on parent mode or the progress report. Even then it shows study time and scores, on this computer or over your home Wi-Fi. Nothing is sent online, and your browsing isn't recorded.
The extension works in Chrome, Edge, Brave, Opera, Vivaldi and Firefox. The phone link works in the browser on any iPhone or Android phone on the same Wi-Fi.
No. Windows shows that for new apps it hasn't seen many times yet. Click More info, then Run anyway. The installer is built automatically from the project's source code.
Usually, if you can install apps. It runs on Windows 10 and 11, macOS, and most Linux desktops. Chromebooks aren't supported yet. If your school locks installs, ask IT.
End of paper
Free to download. No account. Your first sitting takes about two minutes to set up.
Browser extension included with the app · All downloads & older versions
