# Decay Tree vs Nuclide Chart

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.

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.

## The numbers

| Metric | Decay Tree | Nuclide Chart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (7 ratings)](https://appshunter.io/ios/app/decay-tree/id1066023546/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 11 months | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 53 MB | 15 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Gustaf Holst](https://appshunter.io/developer/1066023545) | [Peer Jansen](https://appshunter.io/developer/1859289195) |

## What reviewers say

### Decay Tree

[App page](https://appshunter.io/ios/app/decay-tree/id1066023546)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Radiation Table | $0.99 | one-time |
| Remove Ads | $1.99 | one-time |


### Nuclide Chart

[App page](https://appshunter.io/ios/app/nuclide-chart/id6756217497)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Nuclide Chart Pro | $2.99 | one-time |


## Frequently asked questions

### Is Decay Tree free?

Decay Tree is free to download, with in-app purchases available.

### Is Nuclide Chart free?

Nuclide Chart is free to download, with in-app purchases available.

### Do Decay Tree or Nuclide Chart have ads?

Decay Tree shows ads; Nuclide Chart does not.

### Which is updated more often, Decay Tree or Nuclide Chart?

Decay Tree ships an update every 11 months, and Nuclide Chart daily. Most recently, Decay Tree was updated on September 28, 2026 and Nuclide Chart on October 1, 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.*