Comparison

App4SHM vs PDF. Scanner.

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

App4SHM

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App4SHM is a smartphone application for structural health monitoring (SHM) of bridges or other civil structures to assess their condition after a catastrophic event or when required by authorities and stakeholders. The application interrogates the phone’s internal accelerometer to measure structural accelerations and applies artificial intelligence techniques to detect damage in almost real time. App4SHM resulted from academic research developed at LusΓ³fona University, in particular the Civil Research Group and the Department of Computer Engineering and Information Systems.

About

PDF. Scanner.

Features
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Transform Your iOS Device into a Premier Scanner Download now and turn your iPhone or iPad into a powerhouse scannerβ€”ideal for transforming invoices, contracts, receipts, and more into digital form right from your device. Experience a clutter-free life and seamless document management like never before. Why Our Scanner App Stands Out: β€’ Ad-Free Scanning: Focus on your documents without distractions. β€’ No Hidden Fees: Access all premium features without additional costs. β€’ AI-generated context-driven file names App Highlights: β€’ Exceptional Scan Quality: Achieve brilliantly clear documents consistently. β€’ Intelligent Cropping & Optimization: Automatic adjustments for the perfect scan result. β€’ Efficient Batch Scanning: Handle multiple documents swiftly and easily. β€’ Precision Alignment Tools: Ensure your scans are perfectly aligned every time. β€’ Hands-Free Scanning and Text Recognition: Automatic scanning and text extraction make digitizing a breeze. β€’ Editing and Annotation: Customize your scans with easy editing, signing, and annotating. β€’ Easy Sharing & Collaboration: Share your scans effortlessly for seamless collaboration. β€’ Ultimate Privacy: With on-device document storage, your privacy is guaranteed. Introducing Our Newest Feature: β€’ AI-Powered Filename Generation: Elevate your scanning experience with our groundbreaking AI feature that automatically generates contextually relevant filenames based on the content of your scans. This smart technology simplifies your document organization, saving you time and ensuring easy retrieval. Exclusive to Our App: β€’ 'PDF Content Search' app for macOS: Enhance your productivity further with our macOS app. Revolutionize how you search and manage documents. β€’ Flexible Settings: Adjust DPI, paper formats, and utilize smart rules for filenames to fit your needs perfectly. β€’ Comprehensive Cloud Integration: Choose from optional cloud services like iCloud, Dropbox, Google Drive, and more for effortless storage and sharing. Security and Convenience: β€’ Your Documents, Your Privacy: We prioritize your security with all scans stored directly on your device. Ready for a Game-Changing Scanning Experience? β€’ Say Goodbye to Manual Filenaming: Let AI take the lead and streamline your workflow. β€’ Perfect for All Users: Whether for personal or professional use, our scanner is designed to meet your needs. Download now and be part of the document management revolution. Terms of Use (EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Upgrade your document management today with just a tap. Discover the efficiency of scanning, powered by AI.

Screenshots

App4SHM4 screens
PDF. Scanner.4 screens

Verdict

The call

The clearest difference is in-app purchases: App4SHM at none against PDF. Scanner.'s 3. App4SHM also leads on iOS requirement (13.0 vs 16.4). PDF. Scanner.'s advantage is update cadence (every 3 weeks vs every 4 months). On price, ads and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. PDF. Scanner. sells 3 one-off in-app purchases. App4SHM asks for nothing beyond the download.

UpkeepUpdate frequency

App4SHM ships an update every 4 months, PDF. Scanner. every 3 weeks. The most recent releases landed on October 14, 2026 and October 20, 2026 respectively.

Scorecard3 real differences Β· 3 level
App4SHM versus PDF. Scanner.: the parameters behind the verdict, then further details
ParameterApp4SHMPDF. Scanner.
PriceFreeFree
Update frequencyEvery 4 monthsEvery 3 weeks β€” better
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, iPodiPhone, iPad
Requires iOS13.0 β€” better16.4
Further details β€” not scored
Size27 MB22 MB
Age rating4+17+
DeveloperCOFACJuergen Koller Software GmbH

In-app purchases

None

App4SHM

No in-app purchases

3 purchases

PDF. Scanner.

One-time3
  • 50 AI Names$1.99
  • 200 AI Names$4.99
  • 500 AI Names$8.99

Questions

Is App4SHM free?
App4SHM is free to download, with no in-app purchases.
Is PDF. Scanner. free?
PDF. Scanner. is free to download, with in-app purchases available.
Do App4SHM or PDF. Scanner. have ads?
Neither App4SHM nor PDF. Scanner. shows ads.
Which is updated more often, App4SHM or PDF. Scanner.?
App4SHM ships an update every 4 months, and PDF. Scanner. every 3 weeks. Most recently, App4SHM was updated on October 14, 2026 and PDF. Scanner. on October 20, 2026.

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