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OSS Document Scanner vs FairScan: catalog facts
OSS Document Scanner	FairScan
Free Free and open source under the MIT license.	Free Free and open source under the GPL-3.0, with no ads or paid upgrade.
Android	Android
Scans documents using a phone camera Includes OCR and image processing components	Automatic detection, crop and enhancement OCR for searchable PDFs
Android only	Android only Deliberately simple, with few advanced editing options
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: GPL-3.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.