Comparison

PDF workbench vs Sum

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

Head to head
About

PDF workbench

Edit, convert, and manage PDF documents with a comprehensive suite of tools. Transform images and documents into PDFs, extract text, merge files, and secure your documents with passwords and watermarks. Offers batch processing and an intuitive interface for efficient mobile PDF management.

Highlights
  • Convert images and documents to PDF
  • Convert PDFs to Word, JPEG, PNG
  • Merge and split PDF files
  • Add digital signatures and watermarks
  • Password protection for PDFs
  • Compress PDF file size
  • OCR text extraction
Features
Read full description

PDF workbench: The Complete PDF Editor and Converter. Create, edit, sign, and transform PDF documents instantly on your iPhone and iPad. KEY FEATURES: Convert Files to PDF: - Convert images into professional PDFs - Convert Word documents to PDF - Convert Excel spreadsheets to PDF - Create PDFs from text files Convert PDFs to Other Formats - Extract text from PDFs (OCR) - Convert PDFs to Word documents - Convert PDFs into high-quality images: JPEG and PNG Essential PDF Tools - Merge multiple PDFs into one document - Split PDFs and extract specific pages - Compress PDFs to reduce file size - Add digital signatures to documents - Apply custom watermarks - Protect PDFs with password encryption Professional Features - Multiple signature styles and fonts - Adjustable compression levels - Batch processing capabilities - Easy page organization - Custom watermark positioning - Flexible page selection User-Friendly Interface - Clean, intuitive design - Simple drag-and-drop functionality - Quick file preview - Easy document management - Organized file storage Perfect for professionals, students, and anyone who works with PDF documents. Our app provides all the tools you need to manage your PDFs efficiently on your mobile device. *Free version includes limited number of conversions; unlimited with subscription* *Ad-free experience available with subscription. *Subscription requires a purchase, price may vary depending on location. Some conversions are done on a secure cloud server so you must have an internet connection to use this app. You should be aware that by using this app, you agree that your files will be sent over the internet from the app to the cloud server for conversion. Note: price may vary depending on location. Information about the auto-renewal of subscription: - Payment will be charged to iTunes Account at confirmation of purchase; - Subscriptions are billed monthly or annually at the rate based on the subscription plan - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period; - The account will be charged for renewal within 24-hours before the end of the current period. The cost depends on the selected plan; - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase By downloading and using this app, you agree to our Terms of Use: http://pdfprism.novascriptum.com/terms-of-use/ Download now and transform the way you work with PDFs!

About

Sum

Features
Read full description

Tired of reading long articles, emails, or documents? Sum-Up helps you get straight to the point. Just paste any text, and Sum-Up will instantly generate a clear, concise summary - saving you time while keeping all the key details. Whether you’re a student, professional, or curious reader, Sum-Up makes understanding information faster and easier. Key Features - Instant Summaries: Paste or type any text to get a smart, accurate summary in seconds. - AI-Powered Understanding: Uses intelligent text analysis to extract the most important points. - Multiple Uses: Perfect for articles, reports, essays, research papers, or long emails. - Custom Length Options: Choose how short or detailed you want your summary. - Save and Share: Keep your summaries or share them with friends and colleagues. - Clean Interface: Minimal, distraction-free design for focused reading. Whether you want to boost productivity, study smarter, or simply save time, Sum-Up is your go-to tool for text summarization. Summarize smarter with Sum-Up.

Screenshots

PDF workbench4 screens
Sum3 screens

Verdict

The call

The clearest difference is ads: Sum at none against PDF workbench's shown. Sum also leads on update cadence (every 5 days vs every 2 weeks) and iOS requirement (13.0 vs 15.1). On price, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. PDF workbench sells 2 in-app purchases, starting at $4.99 per month and Sum sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

PDF workbench ships an update every 2 weeks, Sum every 5 days. The most recent releases landed on June 11, 2026 and September 11, 2026 respectively.

Scorecard3 real differences · 7 level
PDF workbench versus Sum: the parameters behind the verdict, then further details
ParameterPDF workbenchSum
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 2 weeksEvery 5 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.113.0 — better
Further details — not scored
Size27 MB32 MB
Age rating4+4+
DeveloperNOVASCRIPTUM LLCAprilred SRL

In-app purchases

2 purchases

PDF workbench

Subscriptions2
  • Monthly$4.991 Month
  • Yearly$49.991 Year
2 purchases

Sum

Subscriptions2
  • Monthly Premium Subscription3 Days trial$4.991 Month
  • Yearly Premium Subscription3 Days trial$35.991 Year

Questions

Is PDF workbench free?
PDF workbench is free to download, with in-app purchases available.
Is Sum free?
Sum is free to download, with in-app purchases available.
Do PDF workbench or Sum have ads?
PDF workbench shows ads; Sum does not.
Which is updated more often, PDF workbench or Sum?
PDF workbench ships an update every 2 weeks, and Sum every 5 days. Most recently, PDF workbench was updated on June 11, 2026 and Sum on September 11, 2026.

Other comparisons