lüft vs RAD
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
lüft
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.
- 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
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Mobile app for lüft made by SunRADON, the company trusted every day by Radon and Indoor-Air-Quality professionals worldwide to monitor homes, schools, workplaces, and health care facilities. Because clean air matters, the lüft mobile app provides you easy access to monitor your Indoor-Air-Quality from anywhere and anytime. A dashboard view gives you access to (6) IAQ sensor readings at once. Traffic light color coding of the sensor readings quickly visualizes elevated or even dangerous readings. The app also provides Indoor Mold Risk and Outdoor Air Quality Risk Indicators for a complete analysis of the air surrounding you. Because Air-Quality and Radon levels fluctuate based on your home’s ventilation, airflow, and weather conditions the built-in trend charts let you drill down and review short- and long-term fluctuations from a single day to a year. Setup up custom alerts and notifications when thresholds are reached to take actions to improve the air you breathe. The lüft Mobile app advanced features also allows you to program the integrated Nightlight function to suit the comfort of your home, synchronize temperature with other lüft™ or HVAC, securely share data with Indoor-Air-Quality professional of your choice, and setup to receive daily, weekly, or monthly air-quality summary reports. It further allows to download trend data for even more in-depth analysis when needed. Setup as easy as 1-2-3: download app, plug in device, and follow the on-screen instructions.
RAD
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.
- Connect to femto-TECH CRM devices
- Download radon monitoring data
- Analyze collected data
- Generate PDF reports
- Data export functionality
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This application is intended for usage with femto-TECH continuous radon monitoring devices. It allows the user to download data directly from the CRM device for analysis and also serves as a PDF report generator.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | lüft | RAD |
|---|---|---|
| Price | Free | Free |
| Rating | 2.6 (8 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 8 — better | 2 |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 46 MB | 109 MB |
| Age rating | 4+ | 4+ |
| Developer | SunRADON LLC | femto-TECH, INC. |
Customer experience
lüft
RAD
In-app purchases
lüft
No in-app purchases
RAD
No in-app purchases









