# RAD vs Decay Lab

The clearest difference is update cadence: Decay Lab at every 4 days against RAD's every 3 weeks. RAD's advantage is iOS requirement (11.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

RAD ships an update every 3 weeks, Decay Lab every 4 days. The most recent releases landed on September 9, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | RAD | Decay Lab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/rad-lab/id1567412980/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | Free | — |
| Size | 109 MB | 6 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [femto-TECH, INC.](https://appshunter.io/developer/1498460992) | [Carlos Uribe](https://appshunter.io/developer/1818871232) |

## What reviewers say

### RAD

[App page](https://appshunter.io/ios/app/rad-lab/id1567412980)

Connect to continuous radon monitoring devices to download and analyze radon data. Generate PDF reports directly from the app for easy sharing and record-keeping.

**Highlights:** Connect to femto-TECH CRM devices, Download radon monitoring data, Analyze collected data, Generate PDF reports, Data export functionality

**In-app purchases:** none


### Decay Lab

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

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

**In-app purchases:** none


## Frequently asked questions

### Is RAD free?

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

### Is Decay Lab free?

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

### Do RAD or Decay Lab have ads?

Neither RAD nor Decay Lab shows ads.

### Which is updated more often, RAD or Decay Lab?

RAD ships an update every 3 weeks, and Decay Lab every 4 days. Most recently, RAD was updated on September 9, 2026 and Decay Lab on September 15, 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.*