# Diffchecker vs Zotero

The clearest difference is review sentiment: Zotero at 78% against Diffchecker's 0%. Zotero also leads on price (Free vs $2.99) and rating (4.6 vs 1.0). On ads, device support and iOS requirement there is nothing between them.

Zotero is free to download; Diffchecker costs $2.99 up front. Diffchecker sells 1 one-off in-app purchase. Zotero asks for nothing beyond the download.

Zotero holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: Zotero has 431 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 0% of Diffchecker's written reviews are positive against 78% of Zotero's.

Diffchecker ships an update every 77 months, Zotero every 3 weeks. The most recent releases landed on September 26, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Diffchecker | Zotero |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [1.0 (3 ratings)](https://appshunter.io/ios/app/diffchecker/id1446215054/reviews) | **[4.6 (431 ratings)](https://appshunter.io/ios/app/zotero/id1513554812/reviews)** |
| Number of ratings | 3 | **431** |
| Positive reviews | 0.0% of reviews | **77.9% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 77 months | **Every 3 weeks** |
| Monetization | Paid | **Free** |
| Size | 5 MB | 237 MB |
| Requires iOS | 17.4 | **16.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ahmad Rahimi](https://appshunter.io/developer/1235600361) | [Zotero](https://appshunter.io/developer/1513554811) |

## What reviewers say

### Diffchecker

[App page](https://appshunter.io/ios/app/diffchecker/id1446215054)

Easily find differences between two texts by pasting, typing, or scanning images. This tool automatically highlights discrepancies with synchronized scrolling for a clear comparison.

**Highlights:** Text difference highlighting, Camera OCR for text extraction, Synchronized scrolling, Paste and type input, Instant comparison

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove advertisements | $0.99 | one-time |


### 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 Diffchecker free?

Diffchecker costs $2.99, and also offers in-app purchases.

### Is Zotero free?

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

### Which has better reviews, Diffchecker or Zotero?

Zotero is rated higher. Diffchecker averages 1.0 out of 5 from 3 ratings, while Zotero averages 4.6 from 431 ratings.

### Do Diffchecker or Zotero have ads?

Neither Diffchecker nor Zotero shows ads.

### Which is updated more often, Diffchecker or Zotero?

Diffchecker ships an update every 77 months, and Zotero every 3 weeks. Most recently, Diffchecker was updated on September 26, 2026 and Zotero on October 15, 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.*