Decay Tree vs Nuclide Chart
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Decay Tree
This educational app visually represents nuclear decay chains for various nuclides. It graphically displays decay modes and half-lives, alongside detailed tables and graphs of spin, specific activity, and emitted particles.
- Visualizes decay chains
- Graphical display of decay modes
- Graphical display of half-lives
- Tabulated details of spin, specific activity, emitted particles
- Graphs of spin, specific activity, emitted particles
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Decay Tree visualizes the whole decay chain for almost any known nuclide. Decay modes and half-lives are graphically shown. In addition, details like spin, specific activity, and emitted particles are tabulated and graphed.
Nuclide Chart
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Explore the world of atomic nuclei with the most advanced Nuclide Chart for iPad. This app offers a complete, interactive visualization of all known isotopes (over 3000), perfect for study, research, and teaching. Features: • Live Data: Direct connection to the IAEA (International Atomic Energy Agency) database for up-to-date physical values. • Interactive: Smoothly zoom and pan through the entire chart of nuclides. • Decay Chains: Visualize decay paths (Alpha, Beta, etc.) instantly – step-by-step or as a full chain. • Smart Search: Find isotopes quickly by symbol, mass, or name. • Advanced Filters: Filter by stability or decay mode (Alpha, Beta+, Beta-, Fission). • Detailed Info: Comprehensive data for every nuclide (Half-life, Spin, Binding Energy, Magnetic Moment, Atomic Mass). • Offline-Ready: All data is cached locally for instant access. Ideal for physicists, chemists, students, and anyone interested in nuclear science.
Screenshots
Verdict
The clearest difference is ads: Nuclide Chart at none against Decay Tree's shown. Nuclide Chart also leads on update cadence (daily vs every 11 months). Decay Tree's advantage is iOS requirement (12.0 vs 17.0). On price, in-app purchases and device support 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. Decay Tree sells 2 one-off in-app purchases and Nuclide Chart sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Decay Tree ships an update every 11 months, Nuclide Chart daily. The most recent releases landed on September 28, 2026 and October 1, 2026 respectively.
| Parameter | Decay Tree | Nuclide Chart |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (7 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 7 — better | — |
| Update frequency | Every 11 months | Daily — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 53 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Gustaf Holst | Peer Jansen |
In-app purchases
Decay Tree
- Radiation Table$0.99
- Remove Ads$1.99
Nuclide Chart
- Nuclide Chart Pro$2.99
Questions
Is Decay Tree free?
Is Nuclide Chart free?
Do Decay Tree or Nuclide Chart have ads?
Which is updated more often, Decay Tree or Nuclide Chart?
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