# Magnetometer+ Metal Detector — Stud Finder & Magnetic Field

> Device-based magnetic field detector and metal scanner with real-time 3-axis readings. (iPhone/iPad app by Kyu-Hee Jang.)

- Source: https://appshunter.io/ios/app/magnetometer-plus-metal-detector/id6760181481 (this page in markdown: same URL + `.md`)
- Developer: [Kyu-Hee Jang](https://appshunter.io/developer/1587578867)
- Category: Productivity, Utilities
- Price: Free
- Rating: 3.00/5 from 8 App Store ratings · 1 written reviews indexed
- Age rating: 17+
- Requires: iOS 16.4 · 62 MB
- Languages: American English
- Released: 2026-03-10
- Data updated: 2026-10-10
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/magnetometer-plus-metal-detector/id6760181481/reviews.md

## What is Magnetometer+ Metal Detector?

Magnetometer+ turns your iPhone's magnetic sensor into a metal detector and stud finder for iron and steel hidden in walls, floors and furniture, and shows the magnetic field around you in µT.

▶ WHAT IT FINDS — AND WHAT IT DOES NOT
It detects ferrous metal: screws and nails in studs and joists, steel pipes, rebar, hinges, brackets and door strikes. The range is a few centimetres, so hold the phone against the surface and sweep slowly.
It cannot detect gold, silver, copper, aluminium, wood or plastic. Those materials are not magnetic, and no phone sensor can find them. If you are looking for buried coins or copper wiring, this is not the tool.

▶ CALIBRATES FROM YOUR HAND
Every phone's magnetic sensor carries a large built-in offset from its own speaker and battery magnets. Magnetometer+ learns that offset while you turn the phone, so tilting the phone does not look like metal. When the meter opens, a progress bar shows how far calibration has come: turn the phone slowly in every direction, and when the bar is full the reading goes live with a short vibration. Zero here re-learns it wherever you are.

▶ THREE METER MODES
• Auto — a radial gauge of the field deviation
• Earth Field — total field strength with a latitude band (low, normal, elevated, high)
• Metal Detector — deviation from the background field with an intensity verdict, plus optional vibration pulses that quicken as you get closer

▶ SCANNER AND STUD FINDER
The Scanner tab has a metal scanner for sweeping a surface and a Stud Finder that marks the strongest point as you slide the phone flat across a wall. It finds the nails and screws that hold drywall to the studs; it does not see the wood itself.

▶ COMPASS
A compass with magnetic north or true north and the local declination.

▶ LIVE DATA
• X, Y and Z field components on a live chart
• Min, average, max and peak with elapsed time
• Sensitivity from 0.5x to 2.0x
• µT, mT and Gauss units

▶ HISTORY AND EXPORT
• Readings are saved with a 7-day trend and a plain-language comparison
• Favourites and side-by-side comparison of two readings
• Continuous one-second logging with CSV export
• Share a reading as an image, optional GPS tag on saved readings
• Statistics report, unlocked for 24 hours by watching a short ad

USEFUL FOR DIY AND RENOVATION · FINDING STUDS AND JOISTS · CHECKING FOR REBAR OR PIPES BEFORE DRILLING · PHYSICS CLASS AND MAGNET EXPERIMENTS

## Key features

- Real-time magnetic field measurement
- 3-axis directional analysis
- Metal and magnet detection alerts
- Radar-style magnetic scanner
- N/S/E/W compass markings
- Adjustable sensitivity

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/magnetometer-plus-metal-detector/id6760181481/reviews.md

### 5/5 — Great

*2026-03-25*

At the moment I tap play it started showing the field generated by a strong magnet in my nightstand 1 meter away

**Developer response:** Thank you! Glad it picked up the magnetic field right away. ⚡

## Frequently asked questions about Magnetometer+ Metal Detector

### What is Magnetometer+?

Magnetometer+ is a mobile application that transforms your device into a magnetic field detector. It measures magnetic field strength in microtesla (µT) and can detect metals and magnets using color-coded alert zones.

### Does Magnetometer+ have ads?

Yes, Magnetometer+ contains advertisements. As a free application, it utilizes ads to support its development and distribution.

### What devices does Magnetometer+ support?

Magnetometer+ is currently supported on iPhone and iPod devices. It is designed to leverage the magnetic sensors present in these devices.

### How accurate are the readings from Magnetometer+?

The app offers real-time magnetic field measurement with features like background baseline calibration and adjustable sensitivity to enhance accuracy in different environments. It provides a 3-axis display for directional analysis.

### What is the age rating for Magnetometer+?

Magnetometer+ has an age rating of 17+. This rating is typically assigned based on the app's content and potential use cases, though the app itself is a scientific utility.

### How often is Magnetometer+ updated?

The latest version of Magnetometer+ is 1.0.7, and it was last updated on May 14, 2026. Updates typically include bug fixes and performance improvements.

### Can Magnetometer+ detect non-metallic objects?

Magnetometer+ is designed to detect magnetic fields, which are primarily associated with metals and magnets. It may not be effective for detecting non-metallic objects unless they possess magnetic properties.

### What does the radar-style scanner in Magnetometer+ show?

The radar-style scanner provides a visual representation of field intensity with a dark navy theme, concentric rings, and N/S/E/W compass markings. The field strength is indicated by a glowing arc in green, yellow, or red.

## Version history (last 5 releases)

### 1.0.31 — 2026-09-24

The meter now shows its calibration: when you open it, a bar fills as you turn the phone, and a short vibration tells you the reading is live. Before, it simply showed 0 µT until calibration finished, which looked like a dead sensor.
• Light haptic feedback on Start, Pause and Zero.
• Clean line icons replace the emoji in the tab bar, sound, location, Zero and share buttons.
• Full Dutch, Danish, Finnish, Czech and Hebrew interface; Norwegian devices now get the Norwegian interface.

### 1.0.30 — 2026-08-30

Store screenshots now show the µT meter, the stud/rebar finder without a wires claim, and the tilt compass — in 30 languages.

### 1.0.29 — 2026-08-14

Your readings are now saved when you leave the meter, not only when you stop recording by hand. Recording starts on its own, so anyone who simply watched the live field and switched tabs was losing that measurement — it is kept now. Unlocking a report also no longer leaves you waiting on a spinner when no video is available.

### 1.0.28 — 2026-08-12

Fixed the reading jumping when you tilt the phone.

Sweeping a wall means tilting, and tilting alone used to move the reading — sometimes far enough to report metal where there was none. The cause was in how the phone's built-in magnetic bias was cancelled: the app zeroed a single number, but that number mixes the phone's own bias with the Earth's field, and only the bias stays put when you turn the phone. Zeroing them together worked at exactly one angle.

The app now learns the bias from the movement of your sweep, which cancels it at every angle. Turn the phone around for a moment when you start; the reading then holds steady until real metal disturbs it, and shows 0 until it has seen enough movement to be sure rather than showing a confident wrong number.

Also in this update:
• The app now says what it can and cannot find. It detects iron and steel — screws, nails, studs, pipes, rebar — within a few centimetres. It cannot detect gold, silver, copper or aluminium, because those metals are not magnetic. That is now stated in the app and in the description instead of being left for you to discover.
• The store listing no longer suggests treasure hunting, which this sensor cannot do.

### 1.0.27 — 2026-08-06

The meter now starts reading the moment you open the app — no more tapping start to see a value.

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## More apps by Kyu-Hee Jang

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- [Barometer: Air Pressure](https://appshunter.io/ios/app/barometer-air-pressure/id6759883097)

All apps by Kyu-Hee Jang: https://appshunter.io/developer/1587578867

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*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 2026-10-10.*