Comparison

Zotero vs SourceKeeper

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

Head to head
About

Zotero

This research tool helps you collect, organize, annotate, cite, and share your academic and professional work. Save articles, books, and webpages, add notes and highlights, and generate bibliographies in thousands of styles. Collaborate with others and sync your library across devices.

Highlights
  • Collect research from various sources
  • Organize with collections and tags
  • Annotate PDFs and webpages
  • Generate citations and bibliographies
  • Collaborate in group libraries
  • Sync across devices
Features
Read full description

Zotero is a free, easy-to-use research tool that helps you collect, organize, annotate, cite, and share your work. COLLECT • Save journal articles, newspaper articles, books, webpages, and more via the Share button in Safari and other apps • Automatically download article PDFs to read • Quickly add physical books and articles to your Zotero library by scanning book barcodes or article DOIs with your iPhone or iPad camera ORGANIZE • Use collections and tags to organize your research • View and edit bibliographic information for your research items ANNOTATE • Read PDFs, EPUBs, and webpage snapshots and add highlights and notes, or use an Apple Pencil to make freehand annotations CITE • Instantly generate citations and bibliographies in over 10,000 formats and journal styles including APA, Chicago, IEEE, MLA, Turabian, and Vancouver SHARE • Collaboratively collect sources and mark up PDFs in group libraries with your colleagues • Synchronize your personal and group research libraries to access them via Zotero’s desktop app and the Zotero website • Use the Zotero desktop app to insert your annotations into Word, LibreOffice, and Google Docs documents and automatically generate bibliographies from the sources you used Visit zotero.org to learn more about everything you can do with Zotero. Having trouble? Have an idea? Post bug reports and feature requests to the Zotero Forums at forums.zotero.org to talk directly to Zotero developers. ZOTERO AND PRIVACY Since 2006, the Zotero team has been committed to creating the best research software, and we believe that includes putting you in full control of your own work. We’re an independent, nonprofit organization, and we’ll never sell your data.

About

SourceKeeper

Effortlessly create properly formatted citations for various source types. Organize your research by project and export bibliographies or footnotes directly to your word processor. Customize the app's appearance with multiple themes and color options.

Highlights
  • Automated source scanning (barcode, photo)
  • Manual source entry
  • Supports Chicago, MLA, and APA styles
  • Organize sources by project
  • Export bibliographies and footnotes
  • Customizable themes and colors
Features
Read full description

SourceKeeper is the research companion built for students, academics, and anyone who needs properly formatted citations without the headache. Scan a book's barcode and SourceKeeper looks up the title, authors, publisher, and publication details automatically. Photograph a journal article page and it reads the metadata for you. Or skip the scanning entirely and enter sources by hand — whatever fits your workflow. Cite every source type Books, journal articles, book chapters, websites, and newspaper or magazine articles — all formatted correctly in Chicago 17th edition, MLA 9th edition, or APA 7th edition. Stay organized by project Create a project for each paper, chapter, or course. Your sources stay grouped, your bibliography stays clean. Export in one tap Generate a formatted bibliography or footnote list for any project, or a master bibliography across all your projects. Export as RTF and open directly in Word, Pages, or Google Docs — italics and formatting intact. Built for real research Citations follow current style guide rules for author formatting, title case, volume and issue numbers, DOIs, edited volumes, and more. Footnote and bibliography formats are both generated for every source. Make it yours Four built-in themes — Academia, Midnight, Botanical, and Slate — plus full color pickers for accent, background, and card colors. Adjust button shape from square to fully rounded.

Screenshots

Zotero2 screens
SourceKeeper3 screens

Verdict

The call

The clearest difference is in-app purchases: Zotero at none against SourceKeeper's 2. Zotero also leads on ratings volume (431 vs 1) and iOS requirement (16.6 vs 26.2). SourceKeeper's advantage is rating (5.0 vs 4.6) and review sentiment (100% vs 78%). On price, ads, monetization model 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. SourceKeeper sells 2 one-off in-app purchases. Zotero asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

SourceKeeper holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Zotero has 431 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 78% of Zotero's written reviews are positive against 100% of SourceKeeper's.

UpkeepUpdate frequency

Zotero ships an update every 3 weeks, SourceKeeper every 9 days. The most recent releases landed on October 15, 2026 and September 29, 2026 respectively.

Scorecard6 real differences · 4 level
Zotero versus SourceKeeper: the parameters behind the verdict, then further details
ParameterZoteroSourceKeeper
PriceFreeFree
Rating4.6 (431 ratings)5.0 (1 ratings) — better
Positive reviews77.9% of reviews100.0% of reviews — better
Number of ratings431 — better1
Update frequencyEvery 3 weeksEvery 9 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.6 — better26.2
Further details — not scored
Size237 MB2 MB
Age rating4+4+
DeveloperZoteroNATHANIEL J MOREHOUSE

Customer experience

Zotero

All ratings431 ratings
Positive89.6%
Neutral4.9%
Negative5.6%
Written reviews263 reviews
Positive77.9%
Neutral10.3%
Negative11.8%

SourceKeeper

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Zotero

Reported bugs

4 issues
  • Unable to unzip PDF snapshots
  • Annotations disappearing or moving unexpectedly
  • Dark mode not working as expected
  • Inability to add citations directly from the app

Requested features

6 requests
  • Eraser tool for annotations
  • More color options for pen and highlighter
  • Ability to open PDFs in external apps
  • Bookmarking and table of contents support
  • Improved search functionality
Show 1 more
  • Offline access to downloaded PDFs

SourceKeeper

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Zotero

No in-app purchases

2 purchases

SourceKeeper

One-time2
  • ProMode$1.99
  • Pro Mode$1.99

Questions

Is Zotero free?
Zotero is free to download, with no in-app purchases.
Is SourceKeeper free?
SourceKeeper is free to download, with in-app purchases available.
Which has better reviews, Zotero or SourceKeeper?
SourceKeeper is rated higher. Zotero averages 4.6 out of 5 from 431 ratings, while SourceKeeper averages 5.0 from 1 ratings.
Do Zotero or SourceKeeper have ads?
Neither Zotero nor SourceKeeper shows ads.
Which is updated more often, Zotero or SourceKeeper?
Zotero ships an update every 3 weeks, and SourceKeeper every 9 days. Most recently, Zotero was updated on October 15, 2026 and SourceKeeper on September 29, 2026.

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