EMF Field Detector RF Scanner vs Blue Hound
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
EMF Field Detector RF Scanner
Detect electromagnetic fields (EMF) using your device's sensors. Get alerted to high magnetic fields and potential radiation sources in your home. Useful for identifying hidden emitters and understanding your environment.
- Detects electromagnetic fields (EMF)
- Warns of high magnetic fields with beeps
- Measures magnetic force on three axes
- Records readings with time and date stamps
- Stores up to 100 records
- Sends measurements via email
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Turn your iPhone into a powerful EMF detector and magnetic field scanner. Detect electromagnetic fields (EMF) around you instantly using the built-in sensor already inside your device — no expensive equipment required. Whether you want to monitor electromagnetic radiation in your home, locate hidden magnetic sources, or even explore paranormal activity, this app gives you a simple and exciting way to measure the invisible world around you. Use the app to scan bedrooms, walls, electrical appliances, Wi-Fi zones, sockets, microwaves, wireless devices, and more. Discover areas with unusually high magnetic activity and receive an instant warning beep when strong EMF levels are detected. Many users also enjoy using the app during ghost hunts and paranormal investigations, as sudden magnetic fluctuations are often associated with supernatural activity. NEW: Experience EMF detection in Augmented Reality. Visualize electromagnetic fields in Augmented Reality to better understand how EMFs spread throughout your home, office, or workspace. The app allows you to see a figurative representation of magnetic activity around you, helping you identify high-radiation zones and understand how far electromagnetic fields may reach in real-world environments. Explore EMFs in a more immersive and intuitive way by combining real-time detection with AR visualization technology. Transform your iPhone into a digital EMF Meter, Teslameter, or electromagnetic field tester using the internal compass hardware. View live magnetic field readings in real time and monitor changes on all three axes (X, Y, Z). Scientists, engineers, students, teachers, paranormal investigators, and curious explorers use EMF detectors to measure magnetic activity in everyday environments. Why use this app? • Detect high electromagnetic field zones around you • Monitor EMF levels near beds, appliances, or workspaces • Receive warning alerts when strong magnetic radiation is detected • Track and store measurements with time and date stamps • Investigate unusual magnetic fluctuations during ghost hunting sessions • Find metallic objects, pipes, or hidden sources behind walls • Explore the invisible electromagnetic world around you Features: • Real-time EMF and magnetic field detection • Warning beep near strong radiation sources • Measures magnetic force on X, Y, and Z axes • Magnetic readings displayed in microteslas (µT) • Save up to 100 EMF records • Record events with exact date & time • Export and send measurements by email • Easy-to-use digital display interface Electromagnetic radiation may come from electrical wiring, appliances, wireless devices, cordless phones, Wi-Fi equipment, sockets, and other electronic sources in your environment. Tips: For best accuracy, calibrate your iPhone by moving it in a figure-8 motion before use. Important: This app requires an iPhone with compass hardware and will not work on iPod Touch devices. Disclaimer: This app is intended for entertainment and informational purposes only. It uses the iPhone magnetometer sensor to detect magnetic field variations near ferromagnetic objects and electromagnetic sources. Download now and start discovering the hidden electromagnetic activity around you.
Blue Hound
Easily scan and locate your Bluetooth-enabled devices, including smartwatches, fitness trackers, and tags. Find lost items like keys or drones using signal strength, heat maps, or direction finders. The app identifies devices by name, maker, and model, and allows you to search the cloud for previously found items.
- Real-time Bluetooth scanning
- Signal strength meter
- Heat map and direction finder
- Cloud search for past devices
- Smart device identification
- Power saver mode
- Audio alerts
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The essential Bluetooth app for scanning and locating your smart devices from Apple, FitBit, Garmin, and many other companies. Scan and identify nearby devices. Locate devices by signal strength, heat map or direction finder. You can now find Fitbit and other Bluetooth devices that are paired with your iPhone. If the Bluetooth device is paired with another iPhone, turn off Bluetooth on that iPhone. Blue Hound is always scanning for Bluetooth devices. When a device is detected, Blue Hound identifies it by name, maker and model when possible. It does this using a large database of smart recognizers that are updated automatically. Devices you find are uploaded to the cloud to help you search for them later. Blue Hound works great with Bluetooth tags. If you attach one to your keys, you can locate them within 100 feet or more even outdoors in high grass. Attach one to your drone and you will be able to find it if it lands unexpectedly. Scanning for Bluetooth devices can be a fun outdoor activity. Take Blue Hound out for a walk. Enable Power Saver Mode for Blue Hound in Settings and put your iPhone in your pocket upside down. The screen will go dark and the app will enter power saver mode. If you wish, Blue Hound can even bark to alert you when a new device is found. Blue Hound has features not found in any other Bluetooth scanner or finder: • Real time Bluetooth scanner with signal strength and description • Sort the scanner list by age, distance or name • Filter the scanner list for matching text • List both active and inactive devices • Power saver option and audio alerts for scanning while walking • Search the cloud for devices you have found in the past • Search for past devices using an interactive map • Smart device identification using cloud updated recognizers • Display detailed information about a devices including is maker and model • Search Google for more information about the device • Get directions to the last known location of the device • Locate a device indoors using a signal strength meter • Locate a device outdoors using a heat map and signal graph • Outdoor direction finder saves time when searching • Display the directions on the map to triangulate the location
Screenshots
Verdict
The clearest difference is in-app purchases: Blue Hound at none against EMF Field Detector RF Scanner's 2. Blue Hound also leads on ads (none vs shown) and price ($1.99 vs $4.99). EMF Field Detector RF Scanner's advantage is review sentiment (84% vs 57%) and ratings volume (5.5K vs 914). On rating, update cadence 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
EMF Field Detector RF Scanner costs $4.99 and Blue Hound $1.99 up front. EMF Field Detector RF Scanner sells 2 one-off in-app purchases. Blue Hound asks for nothing beyond the download.
Blue Hound holds the better App Store score, 4.6 against 4.5. That said, the two scores are not equally well evidenced: EMF Field Detector RF Scanner has 5.5K ratings behind it against 914, so its average is the more settled of the two. Written reviews complicate that: 84% of EMF Field Detector RF Scanner's written reviews are positive against 57% of Blue Hound's, so the app with the better star average is not the one people write more warmly about.
EMF Field Detector RF Scanner ships an update every 3 weeks, Blue Hound every 5 weeks. The most recent releases landed on October 31, 2026 and October 29, 2026 respectively.
| Parameter | EMF Field Detector RF Scanner | Blue Hound |
|---|---|---|
| Price | $4.99 | $1.99 — better |
| Rating | 4.5 (5.5K ratings) | 4.6 (914 ratings) — better |
| Positive reviews | 83.6% of reviews — better | 56.8% of reviews |
| Number of ratings | 5.5K — better | 914 |
| Update frequency | Every 3 weeks — better | Every 5 weeks |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Best chart rank | — | #53 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 11.0 — better |
| Further details — not scored | ||
| Size | 56 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Jorge Gregorio Martin Bello | GrangerFX |
Customer experience
EMF Field Detector RF Scanner
Blue Hound
User reviews
EMF Field Detector RF Scanner
From 5.5K App Store ratingsWhat we love
- 👍 Easy to use
- 🚀 Accurate readings
- 💡 Useful for detecting EMF
- 🔍 Helps identify problem areas
- 📊 Provides clear data and insights
Room to improve
- 🐛 Occasional glitches or inconsistent readings
- 🔋 Concerns about phone's own EMF emissions
- 💰 Premium version required for full functionality
Blue Hound
From 914 App Store ratingsWhat we love
- 👍 Functional
- 🚀 Found lost items quickly
- 💡 Useful for finding lost/misplaced items
- 👍 Cheaper than buying a new device
Room to improve
- 🐛 Key features not working (heatmap, compass)
- 🐛 Inaccurate distance/location information
- 🤔 Lack of instructions/tutorial
- 🤔 Limited device detection
Bugs and requests
EMF Field Detector RF Scanner
Reported bugs
2 issues- App freezes or stops working after updates
- Readings not always accurate or reliable
Requested features
3 requests- Ability to export data
- More detailed explanations and guidance
- Compatibility with other EMF measurement devices
Blue Hound
Reported bugs
3 issues- Unable to detect nearby Bluetooth devices
- Inconsistent performance, app not working at times
- Inaccurate distance and location information
Requested features
4 requests- Ability to set device parameters and utilize scanned devices
- Device details like MAC address, identifiers
- Tutorial or onboarding for new users
- Option to block outside device connections for security
In-app purchases
EMF Field Detector RF Scanner
- Premium Pack$4.99
- Special Offer$4.99
Blue Hound
No in-app purchases
Questions
Is EMF Field Detector RF Scanner free?
Is Blue Hound free?
Which has better reviews, EMF Field Detector RF Scanner or Blue Hound?
Do EMF Field Detector RF Scanner or Blue Hound have ads?
Which is updated more often, EMF Field Detector RF Scanner or Blue Hound?
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