# Metal Detector / EMF Meter > iPhone EMF meter and compass hardware for magnetic field detection and logging. (iPhone/iPad app by Steve Yoes.) - Source: https://appshunter.io/ios/app/metal-detector-emf-meter/id442839608 (this page in markdown: same URL + `.md`) - Developer: [Steve Yoes](https://appshunter.io/developer/440971713) - Category: Utilities, Productivity - Price: Free with in-app purchases (on sale, was $0.99) - Rating: 4.30/5 from 31 App Store ratings · 63 written reviews indexed - Age rating: 4+ - Requires: iOS 6.0 · 5 MB - Languages: American English - Released: 2011-06-15 - Data updated: 2026-06-10 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/metal-detector-emf-meter/id442839608/reviews.md ## What is Metal Detector / EMF Meter? Convert your iPhone into a EMF Meter (electromagnetic field tester). By utilizing the internal compass hardware. You can view the raw data of the magnetic fields that are all around you on a digital display. *********************************** Record your findings with our new feature “Readings Log” In-app email- Send your readings while you continue to use this app. *********************************** Scientist, Teachers, Students, Engineers, Ghost Hunters, all use EMF Meter's for detecting magnetic fields of all types. Features: -Detect the strength of Magnetic force fields on all three axis’s (x,y,z) -Magnetic force is calculated in microteslas ( µ T ) -Record your readings with a time & date stamp of each event. -Pause Magnetic readings with the (Clock) button. To take a reading for an experiment. -Find metallic objects that are hidden behind walls, or under ground. (Ferromagnetic) Settings available: (With in-app upgrade) - Auto sleep disable / enable - Reading calibration - Threshold for readings - Alarm for readings - Reading interval / timer - With settings unlocked you have full control of sensor and data logging. IMPORTANT NOTE: The observed magnitude is the strength or size of the magnetic vector in microteslas ( µ T ). Please observe and respect the iPhone user manual and warranty if you intend to use your iPhone as a scientific device. We are not responsible for any damage that you or any other force of nature may cause to your device. Instructions for the settings are included on the information view. ## Key features - EMF meter functionality - Digital display of magnetic field data - Record readings with timestamp - Detect ferromagnetic objects - Measure magnetic force on three axes - In-app upgrade for advanced settings ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Unlock Settings & Disable Ads | $2.99 | one-time | ## Recent user reviews (10 of 63) All indexed reviews: https://appshunter.io/ios/app/metal-detector-emf-meter/id442839608/reviews.md ### 3/5 — Good app *2020-04-03, version 2.1* Does what it say but my gripe is with the business side of the app. I became aware of this app from a web page stating apps gone temporarily free. No it’s not. Originally £1.99 you now have to pay £2.99 to unlock features and remove ads. You got your web page review under false pretences, it’s clearly not free. ### 5/5 — Good *2019-12-26* Works fine, the free version in iphone 5 thank you to its developers!! ### 1/5 — Map view? *2019-07-06* I purchased the upgrade to get the Map View. But the Map button does nothing. Was this a scam? ### 1/5 — Worthless *2017-07-27* Always flat lines everywhere and anyway I try to use it. ### 5/5 — Works Very Well *2017-06-29* Didn't expect too much when I downloaded it, but is actually quite accurate. Would spike when I turned my lamp on and off, and went crazy when next to me neodymium magnet. Just use airplane mode to get rod of ads. ### 5/5 — Good app *2016-11-03* Detects changes in field strengths. It can even detect a flash drive within a few inches. Also detect the oncoming of a storm by detecting the static electricity buildup in the atmosphere. It has numerous applications it could be applied to. ""But""I would like to see this app be able to recognize and categorize different field sources......Other then that it's a good app and works as well they claim it to be able to. ### 5/5 — Works ok *2016-08-30* Works ol ### 4/5 — Interesting app *2016-06-21* It seems to work well. I tested it by placing my phone near a weak earth magnet and a piece of metal, and the graphs responded accordingly. ### 1/5 — Map doesn't work when you buy *2016-05-25* The app is the same whether you pay or not so don't waste your $0.99 on getting rid of the ads at the bottom. I emailed support about this issue and got a nasty reply back. Wishing I hadn't wasted my money. ### 2/5 — A bit pseudoscientific. *2015-08-27* It's very hit and miss. There doesn't seem to be much science behind what you're claiming its reading. Maybe you could enlighten us? I know there's no EMF measurements in a phone besides it picking up 3-4G signals, so what are you trying to do and what makes you think it's measuring 'metal' AND 'EMF?' How is it measuring both? Metal doesn't emit EMF. Metal detectors don't pick up passive magic beams from metals! ## Frequently asked questions about Metal Detector / EMF Meter ### What does the Metal Detector / EMF Meter app do? This app converts your iPhone into an electromagnetic field (EMF) meter. It utilizes the device's internal compass hardware to display raw magnetic field data on a digital screen. You can also record your findings with a timestamp and detect hidden metallic objects. ### What are the key features of this EMF meter app? Key features include detecting the strength of magnetic force fields on all three axes (x, y, z) in microteslas (µT), recording readings with a time and date stamp, and the ability to find hidden ferromagnetic objects. An in-app upgrade unlocks advanced settings for calibration, thresholds, and alarms. ### Is the Metal Detector / EMF Meter app free to use? The app is free to download and use with its core EMF detection and logging features. However, advanced settings such as reading calibration, threshold alarms, and auto-sleep disable are available through an in-app upgrade, indicating a freemium model. ### What devices is the Metal Detector / EMF Meter app compatible with? The app is designed for iPhones and utilizes the internal compass hardware. Specific iOS version compatibility is not detailed, but users should ensure their iPhone has the necessary sensor hardware for accurate readings. ### Who would find this app useful? This app is useful for a variety of users including scientists, teachers, students, and engineers for experiments and data collection. It's also popular among ghost hunters for detecting magnetic fields and for individuals looking to find hidden metallic objects behind walls or underground. ## Version history (last 3 releases) ### 2.1 — 2015-09-24 This app has been updated by Apple to display the Apple Watch app icon. Fixed long over due bug. Improved Operation New Icon ### 2.0 — 2012-11-25 Optimized for iOS 6 Supports iPhone 5 Added a awesome new feature to the upgrade list. Maps: to view and track your recent activities and recordings. ### 1.0 — 2011-06-15 No release notes. ## More apps by Steve Yoes - [EMF Meter Free Utility for iPod, iPhone](https://appshunter.io/ios/app/emf-meter-free-utility-for-ipod-iphone/id323029497) - [ez level: Bubble level](https://appshunter.io/ios/app/ez-level-bubble-level/id446055216) - [Grid Block Puzzle Game](https://appshunter.io/ios/app/grid-block-puzzle-game/id1015805843) - [SizChat - Talk, Chat & Hangout](https://appshunter.io/ios/app/sizchat-talk-chat-and-hangout/id1525084425) - [Match 3 Candy Sweet](https://appshunter.io/ios/app/match-3-candy-sweet/id1552036504) All apps by Steve Yoes: https://appshunter.io/developer/440971713 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*