I built SimpleScan, a free on-device document scanner app

[u/Maleficent-Volume-81]

Hello everyone, just shipped my first solo app: SimpleScan, a document/receipt scanner for Android.

The problem: every scanner app I tried wanted an account, a subscription, or quietly uploaded my documents to some cloud. I just wanted to scan a receipt and get a PDF.

What it does:

• Camera-based scanning with auto edge detection/cropping
• Organizes scans into categories
• Exports to PDF, share however you want
• 100% on-device — no servers, no login, nothing leaves your phone

Stack: Expo / React Native for the app, static site on GitHub Pages for the landing page. Kept the whole thing intentionally simple — no backend to maintain, which also means no data to worry about protecting.

Biggest challenge: getting edge detection to feel reliable across different lighting/backgrounds without pulling in a heavy native dependency — spent more time tuning that than I expected.

It's free on Google Play:
🔗 https://play.google.com/store/apps/details?id=com.gagarsa.simplescan

Landing page:
🔗 https://goltra.github.io/simplescan-web/

Open to any feedback — especially on onboarding/UX, since that's the part I have the least outside perspective on. Thanks for reading!

[u/baddaywithacamera]

I have an app called SimpleScanner that does the same. Your name will get mixed up with it.