Same PDF, up to four people
solving together on one board
Open a room and share the code.
Friends join without signing up and write with you right away.
No install, no time limit, runs in your browser
Problem 12Find the sum and product of the roots of x² − 5x + 6 = 0.
$0
Free for up to 4
One host and three members. No session time limit.
No signup
Members join with a code
Only the host logs in. Friends need just a nickname.
Steps
Show or hide work
Ink is split by person and step so nobody overwrites others.
Create a room and upload a PDF
Share the room code
Solve together on the PDF
FAQ
Is it really free?
Yes. One host and up to three members. Save the board as a file to continue later.
Do friends need accounts?
No. Room code, room password, and a nickname are enough.
Where is ink stored?
Lesson ink is not kept on our servers. The host can save a file if they want.
Add to home screen
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