# Radioactive Decay Simulator vs Nuclide Chart

The clearest difference is in-app purchases: Radioactive Decay Simulator at none against Nuclide Chart's 1. Radioactive Decay Simulator also leads on iOS requirement (9.3 vs 17.0). Nuclide Chart's advantage is update cadence (daily vs every 17 months). On price, ads and device support there is nothing between them.

Both are free to download. Nuclide Chart sells 1 one-off in-app purchase. Radioactive Decay Simulator asks for nothing beyond the download.

Radioactive Decay Simulator ships an update every 17 months, Nuclide Chart daily. The most recent releases landed on September 29, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Radioactive Decay Simulator | Nuclide Chart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/radioactive-decay-simulator/id959357000/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 17 months | **Daily** |
| Monetization | Free | — |
| Size | 20 MB | 15 MB |
| Requires iOS | **9.3** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Alistair Shaw](https://appshunter.io/developer/959356999) | [Peer Jansen](https://appshunter.io/developer/1859289195) |

## What reviewers say

### Radioactive Decay Simulator

[App page](https://appshunter.io/ios/app/radioactive-decay-simulator/id959357000)

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.

**Highlights:** Emulates radioactive decay, Select preset or custom atoms, Adjust atom count, Real-time decay graphs, Adjustable simulation speed

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 Radioactive Decay Simulator free?

Radioactive Decay Simulator is free to download, with no in-app purchases.

### Is Nuclide Chart free?

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

### Do Radioactive Decay Simulator or Nuclide Chart have ads?

Neither Radioactive Decay Simulator nor Nuclide Chart shows ads.

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

Radioactive Decay Simulator ships an update every 17 months, and Nuclide Chart daily. Most recently, Radioactive Decay Simulator was updated on September 29, 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.*