Free companion app
Your notes, ready to print.
Write a revision card, shrink it until it fits, print it on a strip 40 mm wide — and roll it into your pen.
- Free
- Works offline
- No account
- French & English
Opens in the browser · nothing to install
Try it here
Drag it down until it fits.
A real strip of thermal paper, at actual size. Move the slider, split it into columns, and watch a page of revision become something you can roll into a pen.
- Width
- 36 mm
- Length
- —
- Words
- —
At 1× this is exactly the width that comes out of the printer.
What it does
Four things, and nothing else.
It has one job: make a revision card small enough to live inside a pen. Everything it does serves that, and everything it doesn't do was left out on purpose.
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Type down to 3px
Sixteen pixels for a heading, three for the small print, across up to three columns. A counter holds each card to 125 words, and the preview magnifies to 300% so you can still read what you are writing.
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Formulas in LaTeX
Type the code, watch it render, drop it in — inline or on its own line. Shortcuts for analysis, Greek, sets and trigonometry, plus a drawer of symbols one tap away.
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PDF, or straight to the printer
One tap makes a PDF cut to 40 mm — the exact width of the ribbon. Or send it to the pocket printer over Bluetooth and it comes out in seconds. Thermal, so there is no ink to run out of.
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Yours, and offline
No account, no upload: every card lives on your own device, and the app works on a train with no signal. Six subject templates to start from, in English or French, dark mode included.
Before you open it
Five honest answers.
Anything else, write to [Email] — a person answers.
Ask us anythingIs it really free?
Yes. No trial, no account, no card. It exists so the pen is worth owning, and it stays free whether or not you ever buy one.
Do I need the pen to use it?
No. It makes a PDF 40 mm wide that any printer will handle — cut it out with scissors and it works. The pocket printer just makes it quicker.
Where do my notes go?
Nowhere. They stay in your browser, on your device. We never see them, and there is no server holding them. Export the lot as JSON whenever you want a backup — and remember that clearing your browser data clears them too.
Can I really read 3px type?
On paper, barely — which is the point of a preview that magnifies to 300%. Most people settle around 5 or 6px. The slider above shows you exactly what you are choosing before anything is printed.
Is this for cheating in exams?
No, and we won't pretend otherwise. Taking hidden notes into an exam is cheating wherever you are, and it can end a course. The app is for revision you carry, notes you keep, and words worth folding up — not for a hall with an invigilator in it.
That's the whole of it
Open it, and write something small.
It takes about a minute to make your first card. Nothing to install, nothing to sign up for, nothing to lose if you close the tab.