How long your scans are kept
Grades stay forever. The scanned pages behind them do not.
On the free plan, scanned submission PDFs are removed after a retention window. Everything you did with them stays: the scores, the rubric items you applied, and every comment you wrote. What goes is the page image itself.
This is the one part of the free plan that can surprise you months later, so it is worth reading now rather than then.
What is removed, and what is not
Removed after the window: the scanned PDF of a student's submission, the actual pages you annotated.
Kept indefinitely: the grade, the rubric items applied to it, your comments, and the record that the submission existed. Class statistics and exports built from that data keep working.
In practice: you can always answer "what did this student score on question 3, and why", long after you can no longer show them the page it was written on.
When the clock starts
The window runs from when the assignment was created, not from when the submission was uploaded or graded. An assignment you created in September reaches its window in the same month whether you uploaded the scans in September or in November.
There is no warning
InteGrade does not currently warn you in the app before a scan is removed. Do not wait for a notification that will not come.
If you need to keep the pages
Download what you need while it is there. If a scan matters for an appeal, an audit, or your own records, export or download it during the window and keep it with your own files.
On the full version
Retention limits do not apply. See Upgrading to the full version.