# Particle Zoo vs Isotope Browser

The clearest difference is rating: Isotope Browser at 4.8 against Particle Zoo's 3.9. Particle Zoo's advantage is update cadence (every 3 weeks vs every 6 weeks). On price, review sentiment, ratings volume and ads there is nothing between them.

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

Isotope Browser holds the better App Store score, 4.8 against 3.9. Both are backed by a comparable volume of ratings — 48 and 27 respectively. Written reviews point the same way: 81% of Particle Zoo's written reviews are positive against 83% of Isotope Browser's.

Particle Zoo ships an update every 3 weeks, Isotope Browser every 6 weeks. Both last shipped on November 6, 2026.

## The numbers

| Metric | Particle Zoo | Isotope Browser |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (48 ratings)](https://appshunter.io/ios/app/particle-zoo/id325403123/reviews) | **[4.8 (27 ratings)](https://appshunter.io/ios/app/isotope-browser/id943890538/reviews)** |
| Number of ratings | **48** | 27 |
| Positive reviews | 81.1% of reviews | **82.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Monetization | Free | Free |
| Size | 14 MB | 8 MB |
| Requires iOS | 11.1 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [rickbdotcom LLC](https://appshunter.io/developer/325137420) | [IAEA](https://appshunter.io/developer/535500126) |

## What reviewers say

### Particle Zoo

[App page](https://appshunter.io/ios/app/particle-zoo/id325403123)

Explore the fundamental building blocks of the universe with this pocket guide to subatomic particles. Learn about the diverse particles that constitute matter and energy, inspired by a popular plush toy collection.

**Highlights:** Subatomic particle information, Pocket-sized reference, Educational tool, Inspired by plush toys

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- ✨ Informative and educational
- 🎨 Cute and engaging design
- 👍 Easy to use and understand
- 📚 Great reference tool
- 💡 Fun way to learn physics

**What reviewers complain about**

- 🔗 Broken links
- 📉 Outdated content (Higgs Boson)
- ⏳ Lacks depth for advanced users
- 🧸 Appearance a tad childish
- 🖱️ Navigation can be tiring

**Reported bugs**

- Links don't work
- App no longer works on older iOS versions (iOS 11, iOS 6)
- Higgs Boson listed as theoretical
- Some buttons do not work
- App crashes on older devices

**Requested features**

- Add more particles (Build A Baryon, etc.)
- Animate the critters
- Bring back removed features (Build A Baryon, beta decay simulator)
- Update Higgs Boson information
- Add more interactions (strong, electromagnetic)


### Isotope Browser

[App page](https://appshunter.io/ios/app/isotope-browser/id943890538)

Access comprehensive nuclear data for over 4,000 nuclides and isomers. Explore interactive charts, filter by various criteria, and view detailed information for each nuclide. Data is sourced from reliable resources and available offline.

**Highlights:** Properties of over 4,000 nuclides and isomers, Interactive Chart of Nuclides, Periodic Table of Elements, Filter by half-life, decay mode, radiation type, and energy, Detailed nuclide information with web links, Offline access to embedded database

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

**In-app purchases:** none


## Frequently asked questions

### Is Particle Zoo free?

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

### Is Isotope Browser free?

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

### Which has better reviews, Particle Zoo or Isotope Browser?

Isotope Browser is rated higher. Particle Zoo averages 3.9 out of 5 from 48 ratings, while Isotope Browser averages 4.8 from 27 ratings.

### Do Particle Zoo or Isotope Browser have ads?

Neither Particle Zoo nor Isotope Browser shows ads.

### Which is updated more often, Particle Zoo or Isotope Browser?

Particle Zoo ships an update every 3 weeks, and Isotope Browser every 6 weeks. Most recently, Particle Zoo was updated on November 6, 2026 and Isotope Browser on November 6, 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.*