DocuLensAI.
Private, Offline Document Scanner & PDF Maker with OCR
DocuLensAI turns your phone into a fast, private document scanner. Point the camera at any page and it automatically detects the edges, corrects the perspective, and captures a clean, high-quality scan. On-device AI reads the text with OCR so you can copy and search it, ten professional filters and manual brightness/contrast make every page look professionally scanned, and one tap exports to PDF, image, or plain text. Every scan, filter, and text-recognition step runs entirely on the device — no cloud, no uploads, no account. Built with React Native, Expo, VisionCamera + OpenCV edge detection, a TFLite corner model, and Google ML Kit OCR, with an offline-first SQLite store and AdMob + RevenueCat monetization.
What it does.
Automatic Edge Detection & Auto-Capture
On-Device OCR Text Recognition
Multi-Page Document Scanning
10 Professional Scan Filters
Brightness, Contrast, Crop, Rotate & Flip
One-Tap PDF, Image & Text Export
Full-Text Search Across Every Scan
Smart Tags — Invoices, Receipts, IDs & More
Gallery Import
100% Offline — No Account, No Cloud
Ad-Supported Free Tier + Pro Upgrade
Light & Dark Mode
How it’s built.
Scan Any Document in Seconds
A real-time camera engine finds the page and snaps it for you. VisionCamera drives a live OpenCV + TFLite edge detector that locks onto the document, corrects the perspective, and auto-captures when the frame is steady.
- Automatic edge detection with hands-free auto-capture
- Perspective correction for flat, straight pages
- Multi-page documents — scan a whole stack at once
- Manual corner-crop editor for full control
- Import existing photos from your gallery
Read & Extract Text with On-Device OCR
Google ML Kit reads every page directly on the device, so you can copy the text out of a scan or find any document later just by the words inside it — with nothing sent to a server.
- On-device OCR text recognition (offline)
- Copy extracted text or export it as a .txt file
- Recognized text is indexed for full-text search
- No images or text ever leave the phone
A Full Editing Suite — 10 Filters & Adjustments
Every page gets a proper edit pass. Ten one-tap filters plus manual brightness and contrast turn a phone photo into a crisp, professional-looking scan, and standard tools handle framing.
- Filters: Original, Lighten, Grayscale, Enhance, Magic
- Filters: Vivid, Warm, Cool, Black & White, Ink
- Brightness & contrast sliders
- Crop, rotate and flip per page
Export to PDF, Organize & Find Everything
Turn scans into shareable files in one tap and keep them findable. Export as PDF, JPG, PNG or plain text, print directly, tag documents, and search across titles, tags and the recognized text.
- One-tap PDF, image (JPG/PNG) and text export
- Print straight from the app
- Smart tags: invoices, receipts, IDs, contracts, notes
- Full-text search over all scans (offline SQLite)
Private by Design & Ready to Monetize
DocuLensAI is offline-first with a privacy-conscious business model. The free tier is ad-supported with a generous daily scan allowance; a Pro upgrade unlocks unlimited scans, every filter and export, and removes ads.
- AdMob banner, interstitial and rewarded ads
- RevenueCat-powered Pro subscription & lifetime unlock
- Watch-an-ad unlocks for premium filters & exports
- No sign-up, no cloud sync, no personal data collected
Scan. Read. Export..
Turn your phone into a private, offline document scanner — auto-crop, on-device OCR, and one-tap PDF export. Download DocuLensAI on Google Play.