# Tesla Field Meter > Measures magnetic field strength from static and alternating sources. (iPhone/iPad app by JMS Solutions, LLC.) - Source: https://appshunter.io/ios/app/tesla-field-meter/id351080302 (this page in markdown: same URL + `.md`) - Developer: [JMS Solutions, LLC](https://appshunter.io/developer/351080305) - Category: Education, Entertainment - Price: $0.99 - Rating: 2.80/5 from 9 App Store ratings · 16 written reviews indexed - Age rating: 4+ - Requires: iOS 16.0 · 4 MB - Languages: American English - Released: 2010-01-20 - Data updated: 2026-08-08 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/tesla-field-meter/id351080302/reviews.md ## What is Tesla Field Meter? Tesla Field Meter measures the magnitude of the magnetic field using your iPhone or iPad's built-in magnetometer. It responds to both static (DC) magnetic fields and the alternating magnetic field radiated by AC electrical sources such as microwave ovens, power lines, and household electronics. The research on the adverse biological effects of magnetic field exposure, whether static or alternating, is inconclusive — so it's best to practice prudent avoidance. Low level magnetic fields are naturally generated by the Earth. Higher level fields are generated by sources such as microwave ovens and the clock radio next to your bedside. Use the Tesla Field Meter to make a qualitative assessment of the strength of magnetic field exposure in your environment. Features: • Analog meter display with digital readout • AC and DC measurement modes • 100µT and 1mT range switching • High-pass, low-pass, and moving average digital filters • Real-time magnetic field plot with interactive gestures: - Pinch to zoom the magnetic field scale in or out - Drag horizontally to scroll through recorded history - Drag vertically to shift the baseline for signals with a large DC offset - Double-tap to snap back to live view and restore defaults - Long press to clear and restart recording ## Key features - Measures magnetic field magnitude - Responds to static magnetic fields - Responds to alternating magnetic fields - Qualitative strength assessment - Identifies field sources ## Recent user reviews (10 of 16) All indexed reviews: https://appshunter.io/ios/app/tesla-field-meter/id351080302/reviews.md ### 1/5 — Not good *2021-09-22* doesn't work without location services enabled.. ### 1/5 — Junk *2018-10-21* Don’t work ### 1/5 — JUNK *2016-10-31* Just bought, the dial only moves when u move the phone... THIS IS FAKE. DO NOT WASTE UR MONEY ### 1/5 — Junk *2016-10-12* Does nothing next to hair dryer which is very high EMF output. ### 5/5 — Best of 4 emf apps! *2016-08-23* Of emf detector, radiation detector, metal/emf detector, it is the most simple to use and is quick to understand. I was not forced to rate it. ### 5/5 — Very good app *2016-01-14* Out of many magnetic field apps I use this one because the feature of being able to select AC in effect removes the earth's static field and permits just seeing the effects of AC fields, mainly ELF EMF I think. Great! Users should be aware that on AC if the sensor is moved about, the reading briefly jumps due to moving the sensor within the earth's field. No problem if you know why. Good app, developer responded quickly to questions. ### 5/5 — Very easy to use *2016-01-01* You can pick AC or DC and change units of measurement all on one screen. There's also a time graph associated with it. ### 1/5 — ? *2015-01-18* Seems to do nothing. Maybe better use instructions? ### 5/5 — Good fun for all young scientists. *2014-03-18* I used this app on the iPhone 5. Very reactive to magnetic fields. I love the timeline setting. ### 1/5 — Not very responsive *2013-02-27* It seems that this app can detect B sometimes, but it is inconsistent and not calibrated. Back to the drawing board. ## Frequently asked questions about Tesla Field Meter ### What is Tesla Field Meter used for? Tesla Field Meter is used to measure the magnitude of magnetic fields. It can detect both static and alternating magnetic fields, helping users assess exposure levels. ### What devices is Tesla Field Meter compatible with? Tesla Field Meter is available for iPhone and iPad devices. ### How much does Tesla Field Meter cost? Tesla Field Meter is a paid application, priced at $0.99. ### What is the age rating for Tesla Field Meter? Tesla Field Meter has an age rating of 4+, making it suitable for a wide range of users. ### When was Tesla Field Meter last updated? The latest version of Tesla Field Meter was released on May 24, 2020. ### Does Tesla Field Meter have ads? No, Tesla Field Meter does not contain advertisements. ### What is the user rating for Tesla Field Meter? Tesla Field Meter has an average rating of 2.8 stars based on 9 user reviews. ### Can Tesla Field Meter detect natural magnetic fields? Yes, Tesla Field Meter can detect natural magnetic fields, such as those generated by the Earth. ## Version history (last 5 releases) ### 4.1 — 2026-07-11 Version 4.1 brings a completely redesigned real-time magnetic field plot: • Pinch to zoom the magnetic field scale in or out • Drag horizontally to scroll through recorded history • Drag vertically to shift the baseline when a DC offset pushes the signal off screen • Double-tap to snap back to live view and restore defaults • Long press to clear and restart the recording • Updated for current iOS ### 4.0.0 — 2020-05-24 Updated to utilize the feature set of iOS13 and iPadOS. ### 3.20 — 2014-12-21 Enhanced to leverage new capabilities of iOS 8, iPhone 6 and iPhone 6+. ### 3.00 — 2012-11-16 This is the most significant upgrade to this application since its introduction. The Tesla Field Meter now offers the following features: 1. Added ac metering capability. This mode of operation enables the Tesla Field Meter to measure moving magnetic field anomalies. 2. Added the capability to plot the magnetic fields as a function of time. This mode has the capability to pause the display, scroll back through time, drag to offset the base line magnetic field, pinch zoom the plot or double tap to reset this display. 3. Improvements to the signal processing capability of the instrument. 4. Improvements to leverage the advantages of iOS 6 and the iPhone 5 performance and display. ### 2.10 — 2011-12-19 Enhancement Release ## Apps similar to Tesla Field Meter | App | Rating | Price | Category | | --- | --- | --- | --- | | [Jake for stratigraphy](https://appshunter.io/ios/app/jake-for-stratigraphy/id1486090789) | — | Free | Education | | [Electromagnetic Forces- EMF](https://appshunter.io/ios/app/electromagnetic-forces-emf/id1159691990) | 1.0 (1) | $0.99 | Education | | [Electromag](https://appshunter.io/ios/app/electromag/id404649255) | 5.0 (2) | $1.99 | Education | | [Physics Toolbox Magnetometer](https://appshunter.io/ios/app/physics-toolbox-magnetometer/id1003749103) | 5.0 (7) | Free | Education | | [Muon Tracker](https://appshunter.io/ios/app/muon-tracker/id6745190290) | 5.0 (1) | $1.99 | Education | | [Pic2Mag](https://appshunter.io/ios/app/pic2mag/id1514504657) | 5.0 (1) | Free | Education | --- *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 2026-08-08.*