Comparison

NDT X vs EMF Radiation Detector Reader

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

NDT X

This app provides essential tools for x-ray calculations, including geometric and CT calculations, image viewing, and quality control. It offers explanations for formulas and supports common detectors for easier use.

Highlights
  • TIFF and DICONDE image viewer
  • Geometric calculations
  • X-ray standards support
  • Image quality control
  • CT calculations
  • Formula explanations
  • Detector selection tool
Features
Read full description

NDT X-ray Toolbox is a useful app for x-ray calculations everyday needed. NDT X-ray Toolbox contains: - An image viewer for TIFF and DICONDE x-ray images - Geometric Calculations (Calculation of M, M opt, Ug, Ut) - X-ray Standards (API 5L, ISO 10893-7, ISO 17636-2 including SNRn Calculation) - Image Quality Control (ISO 19232-1 / EN 462-1, ISO 19232-2) - CT Calculations (Calculation of effective Pixel Size, Number of Pictures, Reconstructed Data Size, Best voxel resolution, Tube Voltage) - all Formulas and Shortcuts are given and explained so that if you don't know what a particular Formula/Shortcut means, you can have a quick look in our app, too. We are working on additional features, so it will be updated soon. Also some nice tools are included, e.g. that you can choose, which Detector (the most common Detectors are included) you have, so that you do not have to check out and manually write the Pixel Pitch if you know which Detector you have. Besides NDT X-ray Toolbox is convincing with a modern design that let it make fun to use it.

About

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.

Highlights
  • Detect EMF radiation
  • Measure EMF levels
  • Identify risk zones
  • Organize living space
  • Measure appliance emissions
  • No expensive equipment needed
Features
Read full description

> 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

NDT X4 screens
EMF Radiation Detector Reader3 screens

Verdict

The call

The clearest difference is review sentiment: NDT X at 100% against EMF Radiation Detector Reader's 53%. NDT X also leads on rating (5.0 vs 4.5) and in-app purchases (none vs 2). EMF Radiation Detector Reader's advantage is ratings volume (5K vs 3). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. EMF Radiation Detector Reader sells 2 in-app purchases, starting at $1.99 per 7 days. NDT X asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

NDT X holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: EMF Radiation Detector Reader has 5K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 100% of NDT X's written reviews are positive against 53% of EMF Radiation Detector Reader's.

UpkeepUpdate frequency

NDT X ships an update every 2 weeks, EMF Radiation Detector Reader every 6 months. The most recent releases landed on October 14, 2026 and October 21, 2026 respectively.

Scorecard8 real differences · 2 level
NDT X versus EMF Radiation Detector Reader: the parameters behind the verdict, then further details
ParameterNDT XEMF Radiation Detector Reader
PriceFreeFree
Rating5.0 (3 ratings) — better4.5 (5K ratings)
Positive reviews100.0% of reviews — better53.4% of reviews
Number of ratings35K — better
Update frequencyEvery 2 weeks — betterEvery 6 months
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.6
Further details — not scored
Size83 MB20 MB
Age rating4+4+
DeveloperVisiconsult X-ray Systems & Solutions GmbHRounding Squares BV

Customer experience

NDT X

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

EMF Radiation Detector Reader

All ratings4,966 ratings
Positive87.5%
Neutral4.7%
Negative7.8%
Written reviews380 reviews
Positive53.4%
Neutral8.7%
Negative37.9%

Bugs and requests

NDT X

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

None

NDT X

No in-app purchases

2 purchases

EMF Radiation Detector Reader

Subscriptions2
  • EMF Radiation Detector Premium Week3 Days trial$1.997 Days
  • EMF Radiation Detector Premium Year$9.991 Year

Questions

Is NDT X free?
NDT X is free to download, with no in-app purchases.
Is EMF Radiation Detector Reader free?
EMF Radiation Detector Reader is free to download, with in-app purchases available.
Which has better reviews, NDT X or EMF Radiation Detector Reader?
NDT X is rated higher. NDT X averages 5.0 out of 5 from 3 ratings, while EMF Radiation Detector Reader averages 4.5 from 5K ratings.
Do NDT X or EMF Radiation Detector Reader have ads?
EMF Radiation Detector Reader shows ads; NDT X does not.
Which is updated more often, NDT X or EMF Radiation Detector Reader?
NDT X ships an update every 2 weeks, and EMF Radiation Detector Reader every 6 months. Most recently, NDT X was updated on October 14, 2026 and EMF Radiation Detector Reader on October 21, 2026.

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