# Papers by ReadCube vs Zotero

The clearest difference is rating: Zotero at 4.6 against Papers by ReadCube's 3.7. Zotero also leads on review sentiment (78% vs 41%) and update cadence (every 2 weeks vs every 2 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Zotero holds the better App Store score, 4.6 against 3.7. Both are backed by a comparable volume of ratings — 551 and 425 respectively. Written reviews point the same way: 41% of Papers by ReadCube's written reviews are positive against 78% of Zotero's.

Papers by ReadCube ships an update every 2 months, Zotero every 2 weeks. The most recent releases landed on September 20, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Papers by ReadCube | Zotero |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (551 ratings)](https://appshunter.io/ios/app/papers-by-readcube/id864042981/reviews) | **[4.6 (425 ratings)](https://appshunter.io/ios/app/zotero/id1513554812/reviews)** |
| Number of ratings | **551** | 425 |
| Positive reviews | 41.2% of reviews | **77.9% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 77 MB | 197 MB |
| Requires iOS | **15.6** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Digital Science & Research Solutions Inc.](https://appshunter.io/developer/864042984) | [Zotero](https://appshunter.io/developer/1513554811) |

## What reviewers say

### Papers by ReadCube

[App page](https://appshunter.io/ios/app/papers-by-readcube/id864042981)

Manage, read, and discover research literature on your mobile devices. Annotate PDFs, organize your library with custom lists and tags, and receive personalized recommendations for new papers. Syncs seamlessly with desktop and web applications.

**Highlights:** Read and manage research papers, Annotate PDFs with notes and highlights, Organize library with custom lists and tags, Discover new research with personalized recommendations, Search and download articles, Sync across devices

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Seamless syncing across devices
- 📚 Excellent for organizing and managing research papers
- 🔍 Helpful search and discovery features
- 💻 Good integration with desktop and web versions
- 📝 Useful annotation and highlighting tools

**What reviewers complain about**

- 🐛 Buggy annotation and handwriting tools
- 🔍 Inconsistent search and metadata retrieval
- 💾 Unreliable cloud sync and data loss issues
- 🖍️ Limited annotation features compared to competitors
- 🕰️ Slow development and lack of updates

**Reported bugs**

- Frequent app crashes and freezes
- Sync issues causing data loss and duplication
- Unreliable PDF downloads and access
- Inconsistent behavior of annotation tools
- Compatibility problems with newer devices and OS versions

**Requested features**

- Add eraser tool for handwritten annotations
- Improve PDF viewing and navigation experience
- Implement better organization and folder management
- Integrate citation and bibliography tools
- Provide more customization options


### Zotero

[App page](https://appshunter.io/ios/app/zotero/id1513554812)

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:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and powerful
- 🚀 Convenient and useful
- 🚀 Seamless syncing across devices
- 🚀 Excellent reference management
- 👍 Great annotation and PDF reading experience

**What reviewers complain about**

- 🐛 Crashes frequently
- 🐛 Syncing issues with WebDAV
- 🐛 Metadata not automatically extracted from PDFs
- 🐛 Annotation tools could be improved
- 🐛 Limited sorting and filtering options

**Reported bugs**

- 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**

- 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


## Frequently asked questions

### Is Papers by ReadCube free?

Papers by ReadCube is free to download, with no in-app purchases.

### Is Zotero free?

Zotero is free to download, with no in-app purchases.

### Which has better reviews, Papers by ReadCube or Zotero?

Zotero is rated higher. Papers by ReadCube averages 3.7 out of 5 from 551 ratings, while Zotero averages 4.6 from 425 ratings.

### Do Papers by ReadCube or Zotero have ads?

Neither Papers by ReadCube nor Zotero shows ads.

### Which is updated more often, Papers by ReadCube or Zotero?

Papers by ReadCube ships an update every 2 months, and Zotero every 2 weeks. Most recently, Papers by ReadCube was updated on September 20, 2026 and Zotero on September 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*