Tracer vs EMF Detector
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Tracer
This app works with a smartphone-powered USB device to detect various gas leaks like methane and formaldehyde. It provides real-time monitoring and alerts to enhance safety at home or work. Pinpoint emission sources effortlessly for peace of mind.
- Detects methane, propane, formaldehyde, hydrogen
- Smartphone-powered via USB
- Real-time monitoring and alerts
- Pinpoints gas emission sources
- Enhances safety and peace of mind
Read full descriptionHide full description
Introducing our revolutionary gas detector, designed to detect methane, propane, formaldehyde, and hydrogen with unparalleled accuracy. Powered by your smartphone via USB, eliminating the hassle of battery replacements. With our app-enabled technology, pinpoint the exact sources of gas emissions effortlessly, enhancing safety and peace of mind. Whether at home, work, or on the go, stay informed and protected against potential hazards. Our device offers real-time monitoring and alerts, empowering you to take proactive measures to mitigate risks. Embrace convenience and reliability with our cutting-edge gas detector, ensuring a safer environment for you and your surroundings.
EMF Detector
Transform your iPhone into an EMF detector to monitor electromagnetic fields. Identify radiation levels in various environments to assess safety at home, work, or in public spaces. Gain insights to make informed decisions about your surroundings.
- EMF monitoring
- Electromagnetic field detection
- Radiation level measurement
- Environmental safety assessment
- Real-time EMF readings
Read full descriptionHide full description
Monitor your surroundings with precision using our EMF Monitoring app, designed exclusively for iOS. This innovative application transforms your iPhone into a powerful EMF detector, enabling you to identify electromagnetic fields in various environments. As you move through different areas, the app continuously measures EMF levels, allowing you to easily pinpoint zones of high and low radiation. Whether you're concerned about safety at home, in the workplace, or in public areas, EMF Monitoring provides the insights you need to assess environmental safety and make informed decisions about your surroundings. This app is using the standard Apple Terms of Use (EULA) https://www.apple.com/legal/ internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: EMF Detector at 4.4 against Tracer's 3.7. EMF Detector also leads on ratings volume (338 vs 3). Tracer's advantage is in-app purchases (none vs 3). On price, update cadence, ads and device support 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. EMF Detector sells 2 in-app purchases, starting at $4.99 per month. Tracer asks for nothing beyond the download.
EMF Detector holds the better App Store score, 4.4 against 3.7. That said, the two scores are not equally well evidenced: EMF Detector has 338 ratings behind it against 3, so its average is the more settled of the two.
Tracer ships an update fortnightly, EMF Detector every 2 weeks. The most recent releases landed on October 21, 2026 and October 22, 2026 respectively.
| Parameter | Tracer | EMF Detector |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (3 ratings) | 4.4 (338 ratings) — better |
| Positive reviews | — | 25.0% of reviews |
| Number of ratings | 3 | 338 — better |
| Update frequency | Fortnightly — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 37 MB | 11 MB |
| Age rating | 17+ | 4+ |
| Developer | ReFleX Wireless Inc. | 新雨 李 |
Customer experience
Tracer
EMF Detector
In-app purchases
Tracer
No in-app purchases
EMF Detector
- unlimited features2 variants$4.991 Month
- unlimited features$14.99
