learning · local-first tool
Check Course Materials Before Buying Another Copy
The syllabus, library, previous edition, and a classmate's loan may point to different ways to access the same material; books and supplies also appear in a school's cost-of-attendance estimate.
Index required materials, source, format, access status, purchase need, and the date to confirm edition requirements.
What changes the result: the current course list, edition, accessibility format, and the resources you can use.
Privacy: Calculations run in this browser tab. This tool has no input-upload, account, or AI endpoint. The site may send a page-view signal to Cloudflare; this tool does not add form entries to that signal. A draft is stored only if you choose “Save draft on this device”; that browser storage is not encrypted. Avoid identifiers or sensitive details, and delete saved drafts when finished.
Your entries
The starting rows below are fictional examples. Edit them, replace them with non-sensitive labels and values, or load the sample again. The result is not advice or a source verification.
Amount fields use the same units you enter; the app does not choose a currency. Dates are the ones you provide. Up to 100 rows per run.
Calculated output
What the calculation does
For each item, calculate max(0, target minus available quantity). The total is the sum of those user-defined gaps. A quantity target is not a safety, medical, or purchase recommendation.
Question to keep open: Should the newest edition be bought immediately, or should the instructor's exact requirement and a usable access route be confirmed first?
Boundary: Federal Student Aid describes books and supplies as possible cost-of-attendance items but does not identify the right edition or access option for a course. Confirm course requirements and accessibility needs with the instructor or school.
Copy includes the headline, aggregate metrics, and boundary—not the row-by-row input. The CSV contains entries you choose to download. Review it before sharing.