Isotope Browser vs Radioactive Decay Simulator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
Radioactive Decay Simulator
This educational tool simulates radioactive decay for a group of atoms. Users can choose preset atoms or input custom half-lives to observe decay in real-time graphs. The simulator allows for adjustments in atom count and speed for efficient analysis.
- Emulates radioactive decay
- Select preset or custom atoms
- Adjust atom count
- Real-time decay graphs
- Adjustable simulation speed
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The Radioactive Decay Simulator emulates the radioactive decay of a group of like atoms. Users are able to select from a range of preset atoms, or enter the half-life of a specific atom that they wish to simulate. By adjusting the number of atoms, users are able to determine how even with a large number of atoms, the randomness of radioactive decay can be modeled. Users are able to observe the both number of decayed atoms as well as the number of non-decayed atoms remaining in a real time graph. The simulator can be sped up to allow atoms with a longer half-life to be analyzed quickly.
Screenshots
Verdict
The clearest difference is rating: Isotope Browser at 4.8 against Radioactive Decay Simulator's 4.0. Isotope Browser also leads on update cadence (every 6 weeks vs every 17 months) and ratings volume (27 vs 1). Radioactive Decay Simulator's advantage is review sentiment (100% vs 83%) and iOS requirement (9.3 vs 11.0). On price, ads, in-app purchases and monetization model 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 4.0. That said, the two scores are not equally well evidenced: Isotope Browser has 27 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 83% of Isotope Browser's written reviews are positive against 100% of Radioactive Decay Simulator's, so the app with the better star average is not the one people write more warmly about.
Isotope Browser ships an update every 6 weeks, Radioactive Decay Simulator every 17 months. Both last shipped on November 1, 2026.
| Parameter | Isotope Browser | Radioactive Decay Simulator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (27 ratings) — better | 4.0 (1 ratings) |
| Positive reviews | 82.6% of reviews | 100.0% of reviews — better |
| Number of ratings | 27 — better | 1 |
| Update frequency | Every 6 weeks — better | Every 17 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 | 9.3 — better |
| Further details — not scored | ||
| Size | 8 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | IAEA | Alistair Shaw |
Customer experience
Isotope Browser
Radioactive Decay Simulator
In-app purchases
Isotope Browser
No in-app purchases
Radioactive Decay Simulator
No in-app purchases
Questions
Is Isotope Browser free?
Is Radioactive Decay Simulator free?
Which has better reviews, Isotope Browser or Radioactive Decay Simulator?
Do Isotope Browser or Radioactive Decay Simulator have ads?
Which is updated more often, Isotope Browser or Radioactive Decay Simulator?
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