Comparison

Collections Database vs Combine PDF Files

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

Head to head
About

Collections Database

Organize anything with a personal database app. It offers over 20 field types, customizable layouts, and pre-built templates for common uses like books or expenses. Advanced features and iCloud sync are available.

Highlights
  • 20+ field types (text, number, picture, barcode, etc.)
  • Customizable fields and display styles
  • Pre-built templates (books, contacts, expenses, etc.)
  • Organize with collections and subcollections
  • Password, Face ID, and Touch ID protection
  • iCloud synchronization across devices
  • Advanced fields and calculations (Pro version)
Features
Read full description

Collections is a personal database app to organize anything. 1. A field for every use Collections supports over 20+ field types: • Text, Number • Boolean • Picture • Select • Email, URL, Phone • Password • Date, Time • Color • Barcode And with the Pro version you can use even more advanced fields. • Document reference - Link documents together • Group - Add multiple values for a field • Formula - Create a formula for calculated values. Powerful formula editor with full support to math functions like SUM, AVG • Sources - Import documents from external APIs with Javascript 2. Customizable • Add and reorder fields • Add a separator between fields to better visualize them • Fields have different display styles like primary, secondary, thumbnail • Filter and sort data 3. Templates Collections includes basic templates to get started: • Books • Contacts • Expenses • Subscriptions • Credentials • Inventory • School 5. Advanced management Collections has different tools to help you creating the data model. SUBCOLLECTIONS Organize data into collections and subcollections. Simply said, they are like folders. LISTS A list contains items used in documents and it's very flexible. It could represent a Genre for a book or a Status like 'Available', 'Out of stock' for an object in the inventory. 6. Security • Protect collections using a password, Face ID or Touch ID • Sensitive data such as passwords are encrypted by default 7. iCloud Sync Data is synced automatically between devices through iCloud. 8. Apple's Shortcuts support Expand the app capabilities with Apple's Shortcuts support. 9. Pro version features • Add unlimited documents (free version is limited to 100 documents) • Add files to documents • Add advanced fields • Views • Grid • Use Summary to perform calculations across documents

About

Combine PDF Files

Read full description

PDF Merger - Combine PDFs Effortlessly Transform the way you work with PDFs. PDF Merger makes combining multiple PDF documents simple, fast, and beautiful. Whether you're organizing receipts, merging contracts, or consolidating reports, our app handles it all with elegance and speed. BEAUTIFUL & INTUITIVE • Stunning glass-morphic design that feels right at home on iOS • Drag and drop support for effortless file management • Smooth animations and responsive interactions • Dark mode optimized interface POWERFUL FEATURES • Merge unlimited PDF documents • Custom page range selection - pick exactly which pages to include • Reorder files with simple drag and drop • Live thumbnail previews of your PDFs • Real-time file size estimates • Search through your file list • Full PDF preview before merging SMART & EFFICIENT • Lightning-fast merging engine • Progress tracking with detailed status updates • Automatic duplicate detection • Customizable output filenames with multiple patterns • Optimized file sizes without quality loss SEAMLESS SHARING • Share merged PDFs directly from the app • Compatible with Files, iCloud Drive, Dropbox, and more • Export to any app that supports PDFs • No file size limits PRIVACY FIRST • All processing happens on your device • No internet connection required • Your documents never leave your iPhone or iPad • No tracking, no data collection NO SUBSCRIPTIONS • One-time purchase • All features included • No hidden costs • Free updates PERFECT FOR: • Students combining study materials • Professionals merging contracts and reports • Teachers organizing lesson plans • Anyone managing receipts and invoices • Travelers consolidating tickets and documents • Businesses creating presentation packets WHY PDF MERGER? Unlike clunky online services that require internet, charge monthly fees, or compromise your privacy, PDF Merger puts you in control. Everything happens on your device, instantly and securely. No uploads, no waiting, no subscriptions. The app features a gorgeous, modern interface that makes document management feel effortless. From the moment you open it, you'll appreciate the attention to detail - from smooth animations to intelligent file handling to thoughtful features like custom page ranges and duplicate detection. Whether you need to merge two files or twenty, PDF Merger handles it with speed and grace. The app shows you exactly what's happening with real-time progress updates and gives you complete control over the output with customizable filenames and page selection. WHAT USERS ARE SAYING: "Finally, a PDF merger that doesn't look like it's from 2010!" "Fast, beautiful, and does exactly what I need." "The page range feature is a game-changer." "Love that it works offline and respects my privacy." GET STARTED TODAY Download PDF Merger and experience the easiest way to combine PDFs on iOS. No learning curve, no complications - just beautiful, powerful PDF merging. Questions or feedback? We'd love to hear from you! Contact: [your email]

Screenshots

Collections Database4 screens
Combine PDF Files3 screens

Verdict

The call

The clearest difference is price: Collections Database at Free against Combine PDF Files's $0.99. Combine PDF Files's advantage is in-app purchases (none vs 3). On update cadence, ads, 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

Collections Database is free to download; Combine PDF Files costs $0.99 up front. Collections Database sells 3 one-off in-app purchases. Combine PDF Files asks for nothing beyond the download.

UpkeepUpdate frequency

Collections Database ships an update every 8 days, Combine PDF Files fortnightly. The most recent releases landed on October 21, 2026 and October 12, 2026 respectively.

Scorecard2 real differences · 8 level
Collections Database versus Combine PDF Files: the parameters behind the verdict, then further details
ParameterCollections DatabaseCombine PDF Files
PriceFree — better$0.99
Rating4.6 (192 ratings) — better—
Positive reviews87.1% of reviews—
Number of ratings192 — better—
Update frequencyEvery 8 days — betterFortnightly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod, MaciPhone, iPad, iPod, Mac
Requires iOS15.0 — better15.6
Further details — not scored
Size25 MB2 MB
Age rating4+4+
DeveloperMatteo D'IgnazioMike West

Bugs and requests

Collections Database

Reported bugs

2 issues
  • Keyboard issues when using search
  • Inconsistent behavior between iOS and macOS versions

Requested features

4 requests
  • Collaborative features for sharing databases
  • More advanced reporting and visualization options
  • Improved import/export functionality
  • Ability to customize the appearance and layout

Combine PDF Files

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

Collections Database

One-time3
  • Collections Ultra (Upgrade)$1.99
  • Collections Pro$7.99
  • Collections Ultra$9.99
None

Combine PDF Files

No in-app purchases

Questions

Is Collections Database free?
Collections Database is free to download, with in-app purchases available.
Is Combine PDF Files free?
Combine PDF Files costs $0.99, with no in-app purchases.
Do Collections Database or Combine PDF Files have ads?
Neither Collections Database nor Combine PDF Files shows ads.
Which is updated more often, Collections Database or Combine PDF Files?
Collections Database ships an update every 8 days, and Combine PDF Files fortnightly. Most recently, Collections Database was updated on October 21, 2026 and Combine PDF Files on October 12, 2026.

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