Comparison

Calibration Keeper vs PDF Scanner Document Scanner

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

Head to head
About

Calibration Keeper

Features
Read full description

Calibration Keeper is a product of Trihydro Corporation designed to help teams capture, store, and report data related to the calibration of equipment used in the field for Leak Detection and Repair.

About

PDF Scanner Document Scanner

Features
Read full description

All Document Reader is the perfect app for anyone who needs to quickly and easily view, edit and share documents on their iOS device. With All Document Reader, you can open and view any type of document, including PDFs, Word documents, Excel spreadsheets, PowerPoint presentations, and more. Plus, you can easily edit documents right in the app and share them with others. All Document Reader also makes it easy to edit documents right in the app. You can add text, images, and shapes to your documents, as well as highlight and annotate the text. Plus, you can easily share documents with others via email, AirDrop, or other sharing services. All Document Reader also includes a powerful search feature that makes it easy to find the documents you need. You can search by file name, date, or even content. Full-Featured Document Manager • Easy to use interface: All Document Reader app for iOS provides an intuitive and user-friendly interface that makes it easy to manage documents.
 • Document Viewer: The app allows users to view documents in various formats, including PDF, Word, Excel, PowerPoint, and more.
 • File Management: The app provides a comprehensive file management system that allows users to organize their documents into folders and subfolders.
 • Search Functionality: Provides a powerful search function that allows users to quickly find documents by keyword or phrase.
 • Sharing Options: The app allows users to easily share documents with others via email, text message, or social media.
 PDF Reader • Open and view PDF documents
 • Search for text within PDF documents
 • Annotate PDF documents with highlights, notes, and drawings
 • Fill out PDF forms and sign PDF documents
 • Convert PDF documents to other file formats (e.g., Word, Excel, PowerPoint, etc.)
 • Share PDF documents via email, AirDrop, and other services
 Word Viewer (DOC/DOCX) • Open and view DOC/DOCX files, zoom in/out of documents
 • Share documents via email, AirDrop, or other apps
 • Annotate documents with text, shapes, and drawings
 • Highlight text in different colors
 • View multiple documents side-by-side
 Excel reader, xlsx viewer • Quickly Open and view XLSX and XLS files
 • Search for specific words or phrases
 • Copy and paste text from documents
 • View multiple sheets in a single document
 • View charts and graphs in documents
 • Sort data in tables
 • Add comments to documents
 PPT Viewer (PPT/PPTX) • Easily open and view PowerPoint presentations (PPT/PPTX)
 • View slides in full-screen mode
 • Navigate between slides using swipe gestures
 • Search for specific slides within a presentation
 • Add notes to slides
 TXT File Reader • Open and read TXT files from any source
 • Highlight text for easy reference
 • Bookmark important sections of the text
 • Adjust font size and type for easy reading
 All Document Reader is the perfect app for anyone who needs to quickly and easily view, edit and share documents on their iOS device. Download it today and start viewing, editing, and sharing documents with ease! Subscription Details: 1. One Week - Subscription price: $9.99 2. One Month - Subscription price: $19.99 3. One Year - Subscription price: $49.99 Payment will be charged to iTunes Account at confirmation of purchase Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal No cancellation of the current subscription is allowed during active subscription period Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable Note:- Privacy Policy :- https://www.privacypolicycenter.com/shital_jadhav/privacy.html Terms Of Use :- https://www.privacypolicycenter.com/view_custom.php?v=bzhwVjFOWXcrRDlTYVJIUUNFTUJBZz09&n=all-douments-reader

Screenshots

Calibration Keeper4 screens
PDF Scanner Document Scanner4 screens

Verdict

The call

The clearest difference is in-app purchases: Calibration Keeper at none against PDF Scanner Document Scanner's 3. Calibration Keeper also leads on ads (none vs shown). PDF Scanner Document Scanner's advantage is update cadence (weekly vs every 16 months). On price, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. PDF Scanner Document Scanner sells 3 in-app purchases, starting at $4.99 per month. Calibration Keeper asks for nothing beyond the download.

UpkeepUpdate frequency

Calibration Keeper ships an update every 16 months, PDF Scanner Document Scanner weekly. The most recent releases landed on September 16, 2026 and September 8, 2026 respectively.

Scorecard3 real differences · 3 level
Calibration Keeper versus PDF Scanner Document Scanner: the parameters behind the verdict, then further details
ParameterCalibration KeeperPDF Scanner Document Scanner
PriceFreeFree
Update frequencyEvery 16 monthsWeekly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.114.0 — better
Further details — not scored
Size22 MB57 MB
Age rating4+4+
DeveloperTrihydro CorporationShraddha Limbasiya

In-app purchases

None

Calibration Keeper

No in-app purchases

3 purchases

PDF Scanner Document Scanner

Subscriptions3
  • Monthly Premium Access$4.991 Month
  • Weekly Premium Access$5.997 Days
  • Yearly Premium Access$49.991 Year

Questions

Is Calibration Keeper free?
Calibration Keeper is free to download, with no in-app purchases.
Is PDF Scanner Document Scanner free?
PDF Scanner Document Scanner is free to download, with in-app purchases available.
Do Calibration Keeper or PDF Scanner Document Scanner have ads?
PDF Scanner Document Scanner shows ads; Calibration Keeper does not.
Which is updated more often, Calibration Keeper or PDF Scanner Document Scanner?
Calibration Keeper ships an update every 16 months, and PDF Scanner Document Scanner weekly. Most recently, Calibration Keeper was updated on September 16, 2026 and PDF Scanner Document Scanner on September 8, 2026.

Other comparisons