Live Spectrogram vs EMF Radiation Detector Reader
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Live Spectrogram
Visualize sound frequencies in real-time with this tool. It displays audio intensity across time and frequency using color, helping you perfect singing, analyze animal calls, or locate household noises.
- Real-time audio visualization
- Frequency analysis
- Time-based spectrum display
- Intensity shown by color
- Singing voice perfection
- Animal call analysis
- Sound source identification
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Visualize audio with this handy tool. It displays the frequencies of sound around you over time. The horizontal axis is time, the vertical is frequency, and the intensity of frequencies is shown using pretty shades of red. Use it to: Perfect your singing voice Analyze the call of animals Identify and locate annoying sounds around your house Learn about the world of frequency analysis I hope you enjoy this handy little tool!
EMF Radiation Detector Reader
Detect electromagnetic fields (EMF) around you using your phone's sensors. Identify high-radiation zones in your home and workplace to better organize your environment and potentially improve well-being. Measure EMF emitted by various electronic devices and appliances.
- Detect EMF radiation
- Measure EMF levels
- Identify risk zones
- Organize living space
- Measure appliance emissions
- No expensive equipment needed
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> Detect Invisible Fields: Find the ElectroMagnetic Fields around you in seconds > Pro-Grade Precision: High-accuracy Magnetic Field Analyzer & Gauss Meter with Advanced Signal Stabilization. > Record, Analyze & Export: track trends with interactive data charts and save detailed logs for professional analysis. Check out the areas where you work (desk, meeting rooms), where you sleep (bed), where you relax (couch, living room) and find the levels of EMF you are exposed to. Also use the app to measure the fields emitted by your appliances (computer, fridge, speaker, phone...). PROFESSIONAL MAGNETIC FIELD ANALYZER & GAUSS METER: Discover the invisible magnetic world around you. Using your device’s internal magnetometer, the app provides a comprehensive look at the electromagnetic fields (ELF) generated by electronic devices, wiring, and ferromagnetic materials. NEW PROFESSIONAL FEATURES: - 3-Axis Vector Analysis: Real-time $x, y,$ and $z$ coordinate tracking for precise field directionality. - Interactive History Graphs: Visualize time evolution with high-resolution charts that track spikes and trends. - Clean Signal Mode (LPF): Toggle an advanced Low-Pass Filter to stabilize readings and remove sensor jitter for professional-grade clarity - Save & Export Logs: Record your sessions and export data for further analysis in external software. VERSATILE USE CASES: Electronics Inspection: Measure the magnetic footprint of computers, speakers, and home appliances. Metal Detection: Locate ferromagnetic objects like iron pipes or steel studs behind walls. Interference Calibration: Find the "quietest" zones for sensitive electronic equipment or audio setups. USER EXPECTATIONS & DISCLOSURE: This app is designed as a sophisticated utility for detecting Magnetic Fields (ELF). What it detects: Magnetic flux from magnets, ferrous metals, and the low-frequency electromagnetic fields emitted by electronic components, power supplies, and speakers. What it does NOT detect: This app is not a radio frequency (RF) scanner. It cannot detect Wi-Fi signals, Bluetooth, 5G cellular radiation, or microwave leakage. DISCLAIMER: - This app is intended for educational and utility purposes. It is not a substitute for certified industrial or scientific equipment. It does not provide medical advice or guarantee "safe zones" in a clinical sense. This app does not guarantee exact measures as other fields can interfere with the compass inside your phone, which is used to detect the fields. SUBSCRIPTIONS: - Length: weekly, yearly - Your payment will be charged at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period - Account will be charged for renewal within 24-hours prior to the end of the current period - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase - To Manage or Cancel your subscription, it can be done via the Settings app of your device. For more detail, see https://support.apple.com/en-us/118428 . - To Manage or Cancel your subscription, it can also be done directly from the app: Go to ‘Settings’ screen inside our app, tap on ‘Manage Subscriptions’ and the app will directly open the list of your Subscriptions with the AppStore. You can select a subscription and check available plans or cancel subscription. - When canceling a subscription, your subscription will remain active until the end of the period. Auto-renewal will be disabled but the current subscription will not be refunded. - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable Read our Privacy Policy at: https://roundingsquares.com/privacy/ Read our Terms of Use at: https://roundingsquares.com/terms/
Screenshots
Verdict
The clearest difference is price: EMF Radiation Detector Reader at Free against Live Spectrogram's $1.99. EMF Radiation Detector Reader also leads on ratings volume (4.7K vs 6) and update cadence (every 7 months vs every 31 months). Live Spectrogram's advantage is in-app purchases (none vs 2) and ads (none vs shown). On 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
EMF Radiation Detector Reader is free to download; Live Spectrogram costs $1.99 up front. EMF Radiation Detector Reader sells 2 in-app purchases, starting at $1.99 per 7 days. Live Spectrogram asks for nothing beyond the download.
Live Spectrogram holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: EMF Radiation Detector Reader has 4.7K ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 63% of Live Spectrogram's written reviews are positive against 53% of EMF Radiation Detector Reader's.
Live Spectrogram ships an update every 31 months, EMF Radiation Detector Reader every 7 months. The most recent releases landed on September 4, 2026 and September 24, 2026 respectively.
| Parameter | Live Spectrogram | EMF Radiation Detector Reader |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.8 (6 ratings) — better | 4.5 (4.7K ratings) |
| Positive reviews | 62.5% of reviews — better | 53.0% of reviews |
| Number of ratings | 6 | 4.7K — better |
| Update frequency | Every 31 months | Every 7 months — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Best chart rank | #172 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 15 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | Krueger Systems, Inc. | Rounding Squares BV |
Customer experience
Live Spectrogram
EMF Radiation Detector Reader
Bugs and requests
Live Spectrogram
Not enough reviews yet to summarise bugs or requests.
EMF Radiation Detector Reader
Reported bugs
2 issues- Readings inconsistent or inaccurate
- Doesn't work as expected, only detects magnets
Requested features
3 requests- Add sound or vibration alerts for high EMF
- Provide more information on EMF levels and safety
- Improve layout to avoid ads covering readings
In-app purchases
Live Spectrogram
No in-app purchases
EMF Radiation Detector Reader
- EMF Radiation Detector Premium Week3 Days trial$1.997 Days
- EMF Radiation Detector Premium Year$9.991 Year
Questions
Is Live Spectrogram free?
Is EMF Radiation Detector Reader free?
Which has better reviews, Live Spectrogram or EMF Radiation Detector Reader?
Do Live Spectrogram or EMF Radiation Detector Reader have ads?
Which is updated more often, Live Spectrogram or EMF Radiation Detector Reader?
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