If you've ever sent a "professional" scan to a client and discovered a "CamScanner Premium" watermark across the bottom, you know the problem. The category leaders monetize aggressively — watermarks, subscriptions, mandatory accounts. But there's a small set of free, watermark-free Android scanners that just work. Here are five worth your phone storage in 2026.
1. DocLensPro — Best Overall, MIT-Licensed Core
Score: 8.5/10
DocLensPro is the open-source-rooted document scanner that delivers a CamScanner-grade output without the watermark, account, or subscription wall. Auto edge detection, perspective correction, color/grayscale/B&W modes, multi-page PDF export, and built-in OCR (Tesseract). The Shabbat-mode integration is genuinely thoughtful for observant users. The codebase is forked from de.schliweb.doclenspro with monetization additions that never watermark your output.
- Edge detection + perspective fix (works on receipts and full-page docs)
- OCR with text-layer PDF output
- Multi-page combine into single PDF
- No watermark, no mandatory signup
- Open-source code base — auditable privacy
2. Genius Scan — Solid, Polished Alternative
Score: 7.6/10
Genius Scan ships a generous free tier — no watermark on basic scans, multi-page PDFs work, edge detection is good. The Pro version unlocks cloud sync. If DocLensPro doesn't suit your workflow, Genius Scan is the obvious fallback.
3. Microsoft Lens — Free, but Microsoft-tied
Score: 7.3/10
Microsoft Lens is free, watermark-free, and integrates with OneDrive/Office. Works well — but requires a Microsoft account for save-to-cloud and the UI feels designed for Office 365 users.
4. Simple Scan — Minimalist Open-Source
Score: 7.0/10
The "no frills" option. F-Droid available, GPL licensed. Edge detection is basic, OCR is missing. But if you just need to scan and email a few pages and want a tool you can verify is privacy-clean, Simple Scan is honest software.
5. CamScanner — Honorable Mention, Asterisk
Score: 5.0/10 (free tier)
The category-defining app, included here only because users will Google it. The free tier stamps your outputs with a watermark — unusable for any professional context. The $5.99/month or $69.99/year subscription removes the stamp. Recommended only if you're already subscribed; for new users, DocLensPro is strictly better.
Final Word
DocLensPro is the rare app that solves the watermark problem at the core: it's free with no watermark, optionally monetized via removable ads that never brand your output. App page on MobileUps.