Comparison

Collabora Office vs ctLibrary

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

Head to head
About

Collabora Office

Create and edit documents, spreadsheets, and presentations on your mobile device. This app offers compatibility with a wide range of file formats, including Open Document and Microsoft Office. It's an open-source solution for on-the-go productivity.

Highlights
  • Text editor
  • Spreadsheet program
  • Presentation program
  • Open Document Format support
  • Microsoft Office file compatibility
  • Open Source
Features
Read full description

Collabora Office is a text editor, spreadsheet and presentation program based on LibreOffice, the world's most popular Open Source office suite — and now it's on iOS, enhancing your possibilities to work on mobile devices. This app is in active development, feedback and bug reports are very welcome. Supported files: • Open Document Format (.odt, .odp, .ods, .ots, .ott, .otp) • Microsoft Office 2007/2010/2013/2016/2019 (.docx, .pptx, .xlsx, .dotx, .xltx, .ppsx) • Microsoft Office 97/2000/XP/2003 (.doc, .ppt, .xls, .dot, .xlt, .pps) Report issues: Use the bugtracker and attach any files that caused problems via https://col.la/iosBug . Please note that anything you enter in the bugtracker will be public. About the app: Collabora Office for iOS is based on the LibreOffice code for macOS and other platforms. This, combined with a new front-end based on Collabora Online. Credits: iOS port is mainly based on the work of Collabora engineer Tor Lillqvist, with help of Patrick Luby. Please find a detailed list of contributors in the credits: https://col.la/iosCredits License: Open Source — Mozilla Public License v2 and other

About

ctLibrary

Features
Read full description

ctLibrary is a free offline-first document and notes library. Keep PDFs, Word, Excel, PowerPoint, images, text files, and your own typed notes organized in one place — on your device, and optionally synced across your Apple devices through your own iCloud account. ORGANIZE - Folders contain Categories. Categories contain documents and notes together. - Personal folder with Important Documents and Personal Notes categories, ready on first launch. Create your own folders and categories anytime. IMPORT DOCUMENTS - Import PDFs, Word, Excel, PowerPoint, images, text, CSV, RTF, and Markdown. - Share into ctLibrary from Mail, Files, Safari, cloud-drive apps, and more. - Manual import from the Files picker also supported. READ, SEARCH, SHARE - Open PDFs directly in the app with pinch-to-zoom and pagination. - Preview images, text, and CSV files in-app. - Best-effort preview of Office files; fall back to Open With for full editing. - Fast offline search across document titles, descriptions, file names, and note text. - Favorites and Recent Items for one-tap access. NOTES - Type quick notes alongside your imported documents. - Notes search by title and body content. - Combined view shows documents and notes together inside each category. SYNC ACROSS YOUR APPLE DEVICES (OPTIONAL) - Turn on iCloud Sync in Settings to keep your library in sync between your iPhone and iPad through your own iCloud account. - Data stays in your iCloud account; Cozzitech operates no sync server and never sees it. - Sync is off by default — your library can stay 100% on-device if you prefer. OFFLINE-FIRST PRIVACY - Everything stays on your device (or in your own iCloud, if you turn sync on). We never see your documents or notes. - No analytics, no tracking, no advertising. - Optional App Lock with biometric unlock and recovery code. - Optional one-time email verification unlocks unlimited folders, categories, documents, notes, and outbound sharing. ctLibrary is built for people who want a reliable local reference library — emergency-management binders, work procedures, household paperwork, training materials, or anything you want at hand without depending on a third-party cloud.

Screenshots

Collabora Office4 screens
ctLibrary4 screens

Verdict

The call

The clearest difference is update cadence: ctLibrary at daily against Collabora Office's every 2 months. On price, ads, 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Collabora Office ships an update every 2 months, ctLibrary daily. The most recent releases landed on September 26, 2026 and September 19, 2026 respectively.

Scorecard1 real difference · 9 level
Collabora Office versus ctLibrary: the parameters behind the verdict, then further details
ParameterCollabora OfficectLibrary
PriceFreeFree
Rating3.3 (114 ratings) — better—
Positive reviews40.8% of reviews—
Number of ratings114 — better—
Update frequencyEvery 2 monthsDaily — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.516.4 — better
Further details — not scored
Size320 MB43 MB
Age rating4+4+
DeveloperCollabora ProductivityCozziTech LLC

Bugs and requests

Collabora Office

Reported bugs

4 issues
  • Unable to open password-protected documents
  • Formatting issues with imported documents
  • Inconsistent behavior when switching between apps
  • Keyboard and cursor controls not working as expected

Requested features

5 requests
  • Dark mode option
  • Improved cursor and text selection controls
  • Better integration with cloud storage services
  • More intuitive file naming and saving process
  • Enhanced spreadsheet functionality

ctLibrary

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Collabora Office

No in-app purchases

None

ctLibrary

No in-app purchases

Questions

Is Collabora Office free?
Collabora Office is free to download, with no in-app purchases.
Is ctLibrary free?
ctLibrary is free to download, with no in-app purchases.
Do Collabora Office or ctLibrary have ads?
Neither Collabora Office nor ctLibrary shows ads.
Which is updated more often, Collabora Office or ctLibrary?
Collabora Office ships an update every 2 months, and ctLibrary daily. Most recently, Collabora Office was updated on September 26, 2026 and ctLibrary on September 19, 2026.

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