# GammaGadget vs Decay Lab

The clearest difference is price: Decay Lab at Free against GammaGadget's $4.99. GammaGadget's advantage is iOS requirement (14.2 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

Decay Lab is free to download; GammaGadget costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | GammaGadget | Decay Lab |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/decay-lab/id6746874842/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 4 days |
| Monetization | — | Free |
| Size | 136 MB | 6 MB |
| Requires iOS | **14.2** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Whit Seelbach](https://appshunter.io/developer/1763281213) | [Carlos Uribe](https://appshunter.io/developer/1818871232) |

## What reviewers say

### GammaGadget

[App page](https://appshunter.io/ios/app/gammagadget/id6639622489)

**In-app purchases:** none


### Decay Lab

[App page](https://appshunter.io/ios/app/decay-lab/id6746874842)

This tool simplifies radionuclide decay calculations and radiation unit conversions. It's designed for professionals and students in nuclear medicine and related fields, offering a focused, offline workflow for quick and consistent results.

**Highlights:** Radioactive decay calculations, Activity at different times, Decay corrections, Bq/Ci unit conversions, Absorbed/equivalent dose conversions, Dose rate conversions, Built-in nuclide data

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

**In-app purchases:** none


## Frequently asked questions

### Is GammaGadget free?

GammaGadget costs $4.99, with no in-app purchases.

### Is Decay Lab free?

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

### Do GammaGadget or Decay Lab have ads?

Neither GammaGadget nor Decay Lab shows ads.

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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.*