Particle Zoo vs Isotope Browser
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Particle Zoo
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.
- Subatomic particle information
- Pocket-sized reference
- Educational tool
- Inspired by plush toys
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Would you like to get to know the particles that make up our universe a little better? Then carry this convenient list of subatomic particles in your pocket! Based on The Particle Zoo plushies.
Isotope Browser
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.
- 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
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Provided by the Nuclear Data Section of the International Atomic Energy Agency, the app gives properties of more than 4 000 nuclides and isomers. A Chart of Nuclides, with zooming and tapping enabled, and a Periodic Table of Elements are included to allow easy selection and navigation. Filter criteria on half-life, decay mode, radiation type and energy can be selected. Summary data are presented in a scrolling list, with a details page for each nuclide containing web links to the data sources and further information such as level and decay schema. The filtered nuclides can be visualised on the Chart of Nuclides. Data are taken from the most recent and reliable sources, and optimal search-and-retrieve performance is achieved with an embedded database, meaning that no network connection is required.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Particle Zoo | Isotope Browser |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (48 ratings) | 4.8 (27 ratings) — better |
| Positive reviews | 81.1% of reviews | 82.6% of reviews — better |
| Number of ratings | 48 — better | 27 |
| Update frequency | Every 3 weeks — better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.1 | 11.0 — better |
| Further details — not scored | ||
| Size | 14 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | rickbdotcom LLC | IAEA |
Customer experience
Particle Zoo
Isotope Browser
Bugs and requests
Particle Zoo
Reported bugs
6 issues- 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
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- List scrolls to the top when selecting a particle
Requested features
9 requests- 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)
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- More in-depth information on particles
- Fix navigation bugs (list scrolling)
- Add space time content
- Make critters animated
Isotope Browser
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Particle Zoo
No in-app purchases
Isotope Browser
No in-app purchases
Questions
Is Particle Zoo free?
Is Isotope Browser free?
Which has better reviews, Particle Zoo or Isotope Browser?
Do Particle Zoo or Isotope Browser have ads?
Which is updated more often, Particle Zoo or Isotope Browser?
Other comparisons
