PDF Scanner app vs QR Engine
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PDF Scanner app
Transform your phone into a powerful document scanner. Easily capture, edit, sign, and share documents in PDF format. Securely store all your important papers, from contracts and IDs to receipts and notes, directly on your device.
- Scan documents to PDF
- Edit scanned documents
- Sign documents digitally
- Store documents securely
- Share documents easily
- Text recognition
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Scanner App Pro is an ultimate mobile document scanner. We use the most advanced technology in scanning and text recognition. With our app, you can scan, edit, sign, store, and share your docs in PDF. Instantly scan and convert any handwritten, printed or graphic materials, including: - Сontracts with your business partners or clients - IDs, passports, driver's licenses, credit cards, business cards - Receipts and bills to stay on top of your expenses - Paper notes to make sure your ideas are not lost - Printed articles and book pages - Texts that do not yet exist in digital format - Any other multipage document for any purpose. Forget about paperwork and huge office scanners. All improtant information is now always with you, right in your pocket. Scanning with Scanner App Pro is 100% safe and secure. All scanned and exported docs are stored on your device and can't be accessed by us or third parties. Links to our Terms and Privacy Policy can be found below: Privacy Policy: http://katingo.tilda.ws/scanner_privacy Terms: http://katingo.tilda.ws/scanner_terms
QR Engine
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QR Engine is the ultimate QR code scanner and generator app for iOS, featuring cutting-edge visionOS design and powerful functionality. ADVANCED QR SCANNING • Lightning-fast camera scanning with real-time detection • Support for all standard QR code formats • Instant torch control for low-light environments • Automatic focus and stabilization for accurate scans • Privacy-first approach with secure permission management POWERFUL QR GENERATION • Create QR codes for URLs, text, and contact information • Generate vCard format for seamless contact sharing • Real-time preview with customizable content • High-quality output optimized for all devices • Instant sharing and save options MODERN DESIGN EXPERIENCE • Beautiful visionOS-inspired interface with glass morphism • Native iOS 17+ SwiftUI implementation • Full dark mode support with accessibility features • Intuitive tab-based navigation between scanner and generator • SF Symbols integration throughout the interface PRIVACY AND SECURITY • Comprehensive permission management system • Custom onboarding flows instead of intrusive system alerts • No data collection or tracking • Local processing for maximum security • Transparent permission requests with clear explanations SEAMLESS INTEGRATION • Native Contacts app integration for vCard generation • Share extension support for quick QR generation • Background processing capabilities • Optimized for all iPhone sizes and orientations • Memory-efficient camera handling KEY FEATURES • Scan QR codes instantly with advanced camera technology • Generate QR codes for URLs, plain text, and contact cards • Beautiful glass morphism design following visionOS principles • Complete dark mode support with custom color schemes • Advanced permission handling with user-friendly onboarding • Real-time scanning feedback with haptic responses • High-performance Core Image framework integration • Accessibility support for VoiceOver and Dynamic Type Perfect for professionals, students, and anyone who frequently works with QR codes. QR Engine combines powerful functionality with an elegant user experience, making QR code operations effortless and enjoyable. Download QR Engine today and experience the future of QR code management on iOS.
Screenshots
Verdict
The clearest difference is in-app purchases: QR Engine at none against PDF Scanner app's 4. PDF Scanner app's advantage is update cadence (every 4 days vs every 2 months) and iOS requirement (15.0 vs 17.6). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. PDF Scanner app sells 4 in-app purchases, starting at $4.99 per 7 days. QR Engine asks for nothing beyond the download.
PDF Scanner app ships an update every 4 days, QR Engine every 2 months. The most recent releases landed on October 17, 2026 and October 8, 2026 respectively.
| Parameter | PDF Scanner app | QR Engine |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (1.3K ratings) — better | — |
| Positive reviews | 28.6% of reviews | — |
| Number of ratings | 1.3K — better | — |
| Update frequency | Every 4 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 42 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Mikhail Katin | Ibrahim Uzun |
Bugs and requests
PDF Scanner app
Reported bugs
3 issues- Scanned documents not saving or sending properly
- App randomly switching to 'auto' mode
- Inconsistent document naming when sharing
Requested features
3 requests- Add ability to edit scanned documents
- Improve image quality of scans
- Provide more free features without subscription
QR Engine
Not enough reviews yet to summarise bugs or requests.
In-app purchases
PDF Scanner app
- The PDF Scanner documеntѕ арр$4.997 Days
- The PDF Scanner documеntѕ арр$14.991 Month
- Yearly$39.991 Year
- Full version$29.99
QR Engine
No in-app purchases
Questions
Is PDF Scanner app free?
Is QR Engine free?
Do PDF Scanner app or QR Engine have ads?
Which is updated more often, PDF Scanner app or QR Engine?
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