# Radioactivity vs Atomic Spectra

The clearest difference is device support: Atomic Spectra at 4 against Radioactivity's 1. Radioactivity's advantage is price ($0.99 vs $1.99) and iOS requirement (12.0 vs 26.0). On update cadence, ads and in-app purchases there is nothing between them.

Radioactivity costs $0.99 and Atomic Spectra $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Radioactivity ships an update every 36 months, Atomic Spectra every 19 months. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Radioactivity | Atomic Spectra |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/atomic-spectra/id6444901660/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 36 months | **Every 19 months** |
| Monetization | — | Paid |
| Size | 52 MB | 7 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | iPad | **iPhone, iPad, Mac, Apple TV** |
| Age rating | 4+ | 4+ |
| Developer | [www.ajaxmediatech.com](https://appshunter.io/developer/973768003) | [Jim Haungs](https://appshunter.io/developer/1498282259) |

## What reviewers say

### Radioactivity

[App page](https://appshunter.io/ios/app/radioactivity-physics/id1136130171)

**Features:** macOS Compatibility

**In-app purchases:** none


### Atomic Spectra

[App page](https://appshunter.io/ios/app/atomic-spectra/id6444901660)

This reference app provides detailed information on strong line atomic emission spectra within the visible range. Users can search for elements by name, symbol, or atomic number and inspect individual spectra lines. It offers interactive features to visualize and navigate spectral data.

**Highlights:** Visible range spectra (380-740nm), Search by element name, symbol, or atomic number, Sort by name, symbol, or spectra line count, Inspect individual spectra lines, Interactive spectrum visualization

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Radioactivity free?

Radioactivity costs $0.99, with no in-app purchases.

### Is Atomic Spectra free?

Atomic Spectra costs $1.99, with no in-app purchases.

### Do Radioactivity or Atomic Spectra have ads?

Neither Radioactivity nor Atomic Spectra shows ads.

### Which is updated more often, Radioactivity or Atomic Spectra?

Radioactivity ships an update every 36 months, and Atomic Spectra every 19 months. Most recently, Radioactivity was updated on October 26, 2026 and Atomic Spectra on October 27, 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.*