# Spotxel® Reader vs Zotero

The clearest difference is rating: Zotero at 4.6 against Spotxel® Reader's 2.4. Zotero also leads on in-app purchases (none vs 1) and ratings volume (435 vs 7). Spotxel® Reader's advantage is review sentiment (100% vs 78%). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Spotxel® Reader sells 1 one-off in-app purchase. Zotero asks for nothing beyond the download.

Zotero holds the better App Store score, 4.6 against 2.4. That said, the two scores are not equally well evidenced: Zotero has 435 ratings behind it against 7, so its average is the more settled of the two. Written reviews complicate that: 100% of Spotxel® Reader's written reviews are positive against 78% of Zotero's, so the app with the better star average is not the one people write more warmly about.

Spotxel® Reader ships an update every 2 months, Zotero every 3 weeks. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Spotxel® Reader | Zotero |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.4 (7 ratings)](https://appshunter.io/ios/app/spotxel-reader/id1340235876/reviews) | **[4.6 (435 ratings)](https://appshunter.io/ios/app/zotero/id1513554812/reviews)** |
| Number of ratings | 7 | **435** |
| Positive reviews | **100.0% of reviews** | 77.9% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 43 MB | 237 MB |
| Requires iOS | **16.0** | 16.6 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sicasys Software GmbH](https://appshunter.io/developer/1340235875) | [Zotero](https://appshunter.io/developer/1513554811) |

## What reviewers say

### Spotxel® Reader

[App page](https://appshunter.io/ios/app/spotxel-reader/id1340235876)

This app allows you to capture images of microplates, detect and measure color signals, and analyze sample concentrations. It supports various assay formats and can save, load, and export data.

**Highlights:** Capture microplate images, Detect and measure color signals, Analyze sample concentrations, Save and load assay setups, Export assay data to PDF, Supports row, column, and microarray formats

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Time-Unlimited License | $8.99 | 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 Spotxel® Reader free?

Spotxel® Reader is free to download, with in-app purchases available.

### Is Zotero free?

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

### Which has better reviews, Spotxel® Reader or Zotero?

Zotero is rated higher. Spotxel® Reader averages 2.4 out of 5 from 7 ratings, while Zotero averages 4.6 from 435 ratings.

### Do Spotxel® Reader or Zotero have ads?

Neither Spotxel® Reader nor Zotero shows ads.

### Which is updated more often, Spotxel® Reader or Zotero?

Spotxel® Reader ships an update every 2 months, and Zotero every 3 weeks. Most recently, Spotxel® Reader was updated on October 24, 2026 and Zotero on October 29, 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.*