Decibel X vs EMF Detector
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Decibel X
This tool transforms your device into a professional sound level meter, offering precise measurements of ambient noise. It features advanced calibration, frequency analysis, and data management for various applications, from personal curiosity to professional use.
- Pre-calibrated sound pressure level (SPL) measurements
- Frequency weighting filters (dBA, dBC, ITU-R 468)
- Apple Watch and Health App integration
- History data management with export options
- Dosimeter with NIOSH, OSHA standards
- FFT and BAR graphs for real-time frequency analysis
- InstaDecibel for sharing dB reports on photos
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"Decibel X" is one of very few noise meter apps on the market that has highly reliable, pre-calibrated measurements and supports dBA, dBC. It turns your iOS device into a professional sound level meter, precisely measures the sound pressure level (SPL) all around you. This extremely useful and beautiful tool will not only be a great tool for many uses but also bring you a lot of fun. Have you wondered how quiet is your room or how loud is a rock concert or sport event? "Decibel X" will help you answer all of those. WHAT MAKE IT GREAT AND STAND OUT FROM OTHER APPS: - Trusted accuracy: the app is tested and pre calibrated for all Apple devices. The precision is matching with real SPL devices - Apple Watch support: see noise level right from your wrist - Health App integration: export noise levels directly into Health app - Frequency weighting filters: ITU-R 468, A, B, C, Z - Powerful, smart history data management: + Recording data can be saved into a list of history records for future access and analysis + Each record can be exported as hi-res PNG graph or CSV text via sharing services + iCloud support which synchronize all history records across your Apple devices + Fullscreen mode to give overview the whole history of an record - Dosimeter with NIOSH, OSHA standards - Powerful calibration: Linear, Octave 1/1, 1/3, Load/save profile - FFT and BAR graphs to display real time FFT. Those are very useful for frequency analysis and musical tests. Real time predominant frequency is also displayed. - InstaDecibel to capture your dB report overlaid on photos and easily shared via popular social networks (Facebook, Instagram, Messages, etc.). - Support Live Activity, Dynamic Island - Support both Portrait and Landscape layouts - Beautiful, intuitive and carefully crafted UI design. Themes: LIGHT, DARK and CLASSIC OTHER GREAT FEATURES: - Standard time weightings (Response Time): SLOW (500 milliseconds), FAST (200 milliseconds) AND IMPULSE (50 milliseconds) - MIC Gain Offset from -50 dB to 50 dB - Standard measurement range from 30 dBA up to 130 dBA - HISTO graph for plotted history of the recorded values - WAVE graph with 2 display modes: Rolling & Buffer - SPECTROGRAPH - Real time scale level chart - Display Current, Average/Leq, and Max values with both nice and clear digital and analog layouts - Quick reference text to help you compare with real-life examples NOTES: - Please do not expect a quiet room reading will be 0 dBA. The range 30-130 dBA is the standard usable range and an average quiet room will be about 30 dBA. - Although all devices are pre-calibrated, custom calibration is suggested for serious purposes requiring higher precision and accuracy. You will need a real external device or calibrated sound meter as a reference, then adjust the trimming calibration until the reading matches with the reference. * Privacy Policy: http://www.skypaw.com/decibelx/privacy_policy.html * EULA: http://www.skypaw.com/decibelx/terms.html
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
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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 review sentiment: Decibel X at 66% against EMF Detector's 25%. Decibel X also leads on ratings volume (164K vs 340) and rating (4.6 vs 4.4). EMF Detector's advantage is update cadence (every 2 weeks vs every 3 months) and iOS requirement (13.0 vs 17.0). 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. Decibel X sells 5 in-app purchases, starting at $1.99 per 7 days and EMF Detector sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Decibel X holds the better App Store score, 4.6 against 4.4. That said, the two scores are not equally well evidenced: Decibel X has 164K ratings behind it against 340, so its average is the more settled of the two. Written reviews point the same way: 66% of Decibel X's written reviews are positive against 25% of EMF Detector's.
Decibel X ships an update every 3 months, EMF Detector every 2 weeks. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.
| Parameter | Decibel X | EMF Detector |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (164K ratings) — better | 4.4 (340 ratings) |
| Positive reviews | 66.3% of reviews — better | 25.0% of reviews |
| Number of ratings | 164K — better | 340 |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 17.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 90 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | SkyPaw Co., Limited | 新雨 李 |
Customer experience
Decibel X
EMF Detector
Bugs and requests
Decibel X
Reported bugs
3 issues- App crashes when deleting recordings
- Microphone issues on certain devices
- Saved files not accessible after updates
Requested features
5 requests- Add GPS coordinates to recordings
- Improve reporting and data export
- Provide more weighting options
- Extend frequency range
- Allow music playback while using the app
EMF Detector
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Decibel X
- Weekly Membership$1.997 Days
- Monthly Membership$5.991 Month
- Annual Membership3 Days trial$49.991 Year
- ITU-R 468, A, B, C Weightings$1.99
- Data Export$2.99
EMF Detector
- unlimited features2 variants$4.991 Month
- unlimited features$14.99
Questions
Is Decibel X free?
Is EMF Detector free?
Which has better reviews, Decibel X or EMF Detector?
Do Decibel X or EMF Detector have ads?
Which is updated more often, Decibel X or EMF Detector?
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