# lüft vs RAD

The clearest difference is rating: RAD at 5.0 against lüft's 2.6. RAD also leads on update cadence (every 3 weeks vs every 2 months) and iOS requirement (11.0 vs 13.0). lüft's advantage is ratings volume (8 vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.

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

RAD holds the better App Store score, 5.0 against 2.6. Both are backed by a comparable volume of ratings — 8 and 2 respectively.

lüft ships an update every 2 months, RAD every 3 weeks. The most recent releases landed on July 5, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | lüft | RAD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.6 (8 ratings)](https://appshunter.io/ios/app/luft-sunradon/id1512257787/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/rad-lab/id1567412980/reviews)** |
| Number of ratings | **8** | 2 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 46 MB | 109 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SunRADON LLC](https://appshunter.io/developer/1512257786) | [femto-TECH, INC.](https://appshunter.io/developer/1498460992) |

## What reviewers say

### lüft

[App page](https://appshunter.io/ios/app/luft-sunradon/id1512257787)

Monitor your indoor air quality from anywhere with real-time sensor readings and visual alerts. Track trends, receive custom notifications, and analyze mold and outdoor air risks. Integrates with other devices and allows data sharing with professionals.

**Highlights:** Real-time IAQ sensor readings, Traffic light color-coded alerts, Indoor Mold Risk Indicator, Outdoor Air Quality Risk Indicator, Trend charts for short/long-term fluctuations, Custom alerts and notifications, Nightlight function programming

**In-app purchases:** none


### 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


## Frequently asked questions

### Is lüft free?

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

### Is RAD free?

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

### Which has better reviews, lüft or RAD?

RAD is rated higher. lüft averages 2.6 out of 5 from 8 ratings, while RAD averages 5.0 from 2 ratings.

### Do lüft or RAD have ads?

Neither lüft nor RAD shows ads.

### Which is updated more often, lüft or RAD?

lüft ships an update every 2 months, and RAD every 3 weeks. Most recently, lüft was updated on July 5, 2026 and RAD on September 9, 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.*