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Best Nsd Detector Apps

226+ iOS apps curated and reviewed

4.2 avg rating
20 free apps
Updated June 2026

Finding the right nsd detector apps can be overwhelming with so many options. We've analyzed 226+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.

Compare top Nsd Detector Apps (June 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1NSD DetectorNSD DetectorFree—NoNoMay 2026
2EMF Radiation DetectorEMF Radiation DetectorFree3.4★ (200)NoNoMay 2026
3EMF Radiation Detector ReaderEMF Radiation Detector ReaderFree4.5★ (4.5K)YesNoJul 2026
4My Lightning Tracker & AlertsMy Lightning Tracker & AlertsFree4.8★ (63K)YesNoJul 2026
5TingTingFree4.8★ (93K)NoNoJul 2026
6Device Detector: Wifi AnalyzerDevice Detector: Wifi AnalyzerFree4.5★ (3.5K)YesNoJul 2026
7Nearby Device Detector: ScanNearby Device Detector: ScanFree4.5★ (2.4K)NoYesJul 2026
8Ghost Detector Tool - Free EVP, EMF, and Tracking ToolGhost Detector Tool - Free EVP, EMF, and Tracking ToolFree3.3★ (232)NoYesMay 2026

Top Picks for Nsd Detector

EMF Radiation Detector#2

EMF Radiation Detector by Ngoc Que Nguyen

Strong Contender
🔧 Utilities
3.4😞(200 ratings)
Free
EMF Radiation Detector screenshot 1
EMF Radiation Detector screenshot 2
EMF Radiation Detector screenshot 3
EMF Radiation Detector screenshot 4

Detect electromagnetic radiation (EMF) emitted by everyday devices. This app uses your iPhone to measure nearby fields, alerting you to potentially harmful levels that could impact your health and environment.

What We Love

  • 👍 Simple and clean user interface
  • 💰 Free app with no ads
  • 🧲 Accurately detects magnetic fields
  • 🎮 Fun to experiment with as entertainment

Room to Improve

  • ❌ Misleading app description and marketing
  • 🚫 Does NOT detect EMF radiation as advertised
  • 🚫 Does NOT detect radio frequencies or electric fields
EMF Radiation Detector Reader#3

EMF Radiation Detector Reader by Rounding Squares BV

Detect EMF Radiation Meter
Worth Considering
🔧 Utilities
4.5😐(4.5K ratings)
FreeAdsIn-App Purchases
EMF Radiation Detector Reader screenshot 1
EMF Radiation Detector Reader screenshot 2
EMF Radiation Detector Reader screenshot 3

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.

What We Love

  • 👍 Works well around microwave
  • 👍 Consistent results
  • 👍 Useful tool for detecting EMF
  • 👍 Legit EMF detection

Room to Improve

  • 🐛 Ads cover reading numbers
  • 🔍 Unclear how to interpret readings
  • ⚠️ Questionable accuracy, only detects magnets

More Nsd Detector apps to explore

4
My Lightning Tracker & Alerts
My Lightning Tracker & Alerts
My Lightning Tracker & Alerts
Live Lightning Map & Tracker
Free

Monitor global lightning strikes in near real-time on a live map. Receive alerts for nearby storms and view historical strike data. Track weather radar and share strike information with friends.

Global lightning strike detection and displayReal-time thunderstorm monitoring mapLightning strike history and hotspot analysis
☀️ Weather
(63K)
ad-supported
5
Ting
Ting
Ting
by Whisker Labs, Inc.
Free

This app offers two primary functions for home electrical safety. It can prevent electrical fires by detecting hazards with a smart sensor and coordinating repairs, or it can provide real-time power outage alerts and an interactive map for your neighborhood.

Electrical fire preventionSmart sensor for micro-arcsLicensed electrician coordination
🌟 Lifestyle
(93K)
free
6
Device Detector: Wifi Analyzer
Device Detector: Wifi Analyzer
Device Detector: Wifi Analyzer
Find Hidden Devices On Network
Free

Scan and analyze all devices connected to your local network. This essential tool helps protect your privacy by identifying everything on your network. Regular updates ensure an improved user experience.

Scan local networkAnalyze connected devicesPrivacy protection
🔧 Utilities
(3.5K)
ad-supported
7
Nearby Device Detector: Scan
Nearby Device Detector: Scan
Nearby Device Detector: Scan
Device Detector and Spy Finder
Free

Scan your current network for suspicious devices and identify hidden cameras or bugs using advanced AI and Wi-Fi scanning. Protect your privacy in hotels, public spaces, and more by ensuring your environment is safe.

Detect suspicious devices on Wi-FiAI-powered spy device detectionFetch device details
🌟 Lifestyle
(2.4K)
subscription
8
Ghost Detector Tool - Free EVP, EMF, and Tracking Tool
Ghost Detector Tool - Free EVP, EMF, and Tracking Tool
Ghost Detector Tool - Free EVP, EMF, and Tracking Tool
by WL Online Marketing LLC
Free

Detect paranormal activity using multiple scanning frequencies, including EVP, EMF, and video. Explore your surroundings by listening for unusual sounds or asking questions to the other side. This app is designed for entertainment and novelty.

Multi-frequency paranormal scanningEVP (Electronic Voice Phenomenon) detectionEMF (Electromagnetic Field) detection
🎬 Entertainment
(232)
free with in-app purchases
9
Metal Detector (PRO)
Metal Detector (PRO)
Metal Detector (PRO)
Detect ferromagnetic objects
Free

Transform your iPhone into a fun metal detector using its built-in magnetometer. Explore your surroundings, surprise friends with its entertainment features, and enjoy visual and audio feedback. Note: This app is for entertainment and does not offer true metal detection capabilities.

Simulated metal detectionVisual and audio feedbackAdjustable sensitivity
🔧 Utilities
(203)
free with in-app purchases
10
EMF Detector-Radiation Reader
EMF Detector-Radiation Reader
EMF Detector-Radiation Reader
iemf,frequency detector
Free

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 monitoringElectromagnetic field detectionRadiation level measurement
🔧 Utilities
(238)
free with in-app purchases
11
RF Signal Detector
RF Signal Detector
RF Signal Detector
RF Signal Detector Analyzer
Free

This application offers real-time radio frequency signal detection and analysis. It monitors signal strength, analyzes frequency bands, and identifies interference sources. The tool provides historical data and network optimization insights for a better wireless experience.

Real-time signal monitoringFrequency band analysis (2.4 GHz & 5 GHz)Interference detection and categorization
🔧 Utilities
(59)
freemium
12
Stud Find - Metal Detector
Stud Find - Metal Detector
Stud Find - Metal Detector
by Proteverse LLC
Free

Detect magnetic metal objects, such as nails, hidden within wooden structures using your device's built-in magnetometer. This tool is designed to help locate magnetic materials behind walls or other surfaces. Performance may vary based on wall construction and device capabilities.

Detects magnetic metal objectsLocates nails in wooden beamsUtilizes device magnetometer
📊 Productivity
(244)
free with in-app purchases
13
Find Hidden: Wireless Detector
Find Hidden: Wireless Detector
Find Hidden: Wireless Detector
Detector & Scanner Devices
Free

This app helps you detect suspicious electronic devices on your network. It scans your environment in real-time to identify connected devices, distinguishing between safe and potentially hidden ones. Protect your privacy in new locations or while traveling.

Detect suspicious peripheralsInspect spy device informationScan all connected electronic devices
🔧 Utilities
(341)
subscription
14
Detector:Find Lost/Spy Device
Detector:Find Lost/Spy Device
Detector:Find Lost/Spy Device
Find The Lost or Spy Devices
Free

Detect hidden spy devices like cameras and microphones using advanced technology. This app helps you safeguard your privacy by scanning for Bluetooth, magnetic fields, infrared, and Wi-Fi signals. Restore peace of mind by unmasking intrusive gadgets in your surroundings.

Multi-faceted detection (Bluetooth, magnetic, infrared, Wi-Fi)User-friendly interfaceReal-time alerts
🔧 Utilities
(365)
ad-supported
15
Metal Detector EMF
Metal Detector EMF
Metal Detector EMF
Find metals and magnetic field
Free

This application uses your smartphone's magnetic sensor to detect nearby metal objects. It can help you find hidden metallic items, act as a treasure hunting tool, or even assist in ghost hunting by visualizing magnetic field trends. Requires a device with a magnetic sensor to function.

Detects nearby metalMeasures magnetic fieldFinds hidden metallic objects
🔧 Utilities
(2.2K)
free with in-app purchases
16
Hidden Camera Spy Detector Hid
Hidden Camera Spy Detector Hid
Hidden Camera Spy Detector Hid
Hidden Spy Detector Device 黑客
Free

Detect hidden cameras, microphones, and speakers on your network. This app offers advanced scanning capabilities, scan history, customizable alerts, and an ad-free experience to help you maintain privacy and security.

Network scanning for hidden devicesDetects cameras, microphones, and speakersEnhanced scanning capabilities
🔧 Utilities
(941)
free with in-app purchases
17
Metal Detector for iPhone
Metal Detector for iPhone
Metal Detector for iPhone
by nakhon phagdeechat
Free

Detect metal objects by measuring the magnetic field around you. The app uses your device's built-in sensor to display magnetic field trends and alerts you with sound when a strong signal is detected, indicating a potential metal object. Customize alerts, lighting, and themes for a personalized experience.

Magnetic field measurementTrend displaySound alerts
🔧 Utilities
(348)
ad-supported
18
Hidden Camera DETECTOR - WLAN
Hidden Camera DETECTOR - WLAN
Hidden Camera DETECTOR - WLAN
Network Scanner, Device Finder
Free

This app helps you find hidden cameras and spy devices using your phone's sensors and network scanning. It also offers features to track your Bluetooth devices, mask private conversations, and secure evidence of suspicious findings.

Detect hidden cameras with filtersTrack Bluetooth devicesScan for suspicious devices
🔧 Utilities
(1.8K)
free with in-app purchases
19
Wall Stud Magnetic Detector
Wall Stud Magnetic Detector
Wall Stud Magnetic Detector
Metal finder for Studs & Wires
Free

This app uses your device's magnetometer to detect metal studs, nails, and screws behind walls. It provides an audible beep and visual indication as you scan, similar to a handheld stud finder. Ideal for DIYers and contractors locating structural elements.

Detects metal studs, nails, and screwsUses device's compass (magnetometer) sensorActive detection beep
🔧 Utilities
(646)
free with in-app purchases
20
Metal&Gold Detector: Scanner
Metal&Gold Detector: Scanner
Metal&Gold Detector: Scanner
Metal Detector Sniffer Detecta
Free

This app uses your device's sensors to detect metals, providing sound and vibration alerts. Navigate with a built-in compass and enjoy an easy-to-use interface for treasure hunting.

High-precision metal sensorsCustomizable sound and vibration alertsBuilt-in navigation compass
🔧 Utilities
(119)
free with in-app purchases

FAQ about Nsd Detector

Are there free nsd detector apps for iPhone?
Yes — 20 of the top nsd detector apps we rank are free to download, including NSD Detector and EMF Radiation Detector.
NSD Detector has no ads and has no in-app purchases, according to its App Store listing as of June 2026.
We track 226+ nsd detector apps on the iOS App Store as of June 2026, ranked by rating, recency, and analysis of real user reviews.