# eTesla

> Detects and measures magnetic fields using the phone's compass. (iPhone/iPad app by Straccia Emidio Co.Sei sistemi.)

- Source: https://appshunter.io/ios/app/etesla/id942443685 (this page in markdown: same URL + `.md`)
- Developer: [Straccia Emidio Co.Sei sistemi](https://appshunter.io/developer/936358777)
- Category: Utilities, Education
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 6.0 · 14 MB
- Languages: American English
- Released: 2014-11-21
- Data updated: 2026-06-02
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/etesla/id942443685/reviews.md

## What is eTesla?

By using data from the phone internal compass,    
 This app can measure the magnetic field generated from metals 
 Or  high electromagnetic emission from High Voltage line ,Transformer , 
 Electric motors,and some  home appliance such as microwave oven. 

The units of measure is Tesla -µT  :  Nikola Tesla    (10-Jul-1856 - 07-Jan-1943)  
 inventor of the Tesla coil and developer of inductor motor working by alternate current.
The  normal  earth emissions is around    20-40 µT. 

 High magnetic field can reach 200 µT (e.g. near to speakers). 
In very high magnetic field (e.g. near electric motors ) it can be over 300 µT
 such high magnetic field ,can easy damage credit ,mechanical watch . 

 If the phone has been exposed to e high magnetic field , the sensor need to be         recalibrate by just shake the phone until the data reader become normal range.

 A alarm can be set by the slider, over that value the value become red and the phone will vibrate.
 
 So: stay away from strong magnetic field : find it and avoid it.

## Key features

- Measures magnetic field strength
- Detects EMF from electronics
- Identifies high voltage sources
- Alerts for strong magnetic fields
- Sensor recalibration function

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/etesla/id942443685/reviews.md

### 5/5 — Test Electricmotor immediately

*2020-12-30*

Thank you so much, Dear Emilio

### 1/5 — Fake

*2020-01-02*

Fake app waste of time . Goes off when near metal not near a wifi router. Idiots.

### 5/5 — eTesla

*2015-04-13, version 1.0*

Ottima

### 5/5 — Utile

*2014-12-07, version 1.0*

Il Top

## Frequently asked questions about eTesla

### What can eTesla detect?

eTesla can measure magnetic fields generated by metals, high electromagnetic emissions from high voltage lines, transformers, electric motors, and some home appliances like microwave ovens. It uses your phone's internal compass for these measurements.

### What units does eTesla use?

eTesla measures magnetic fields in Tesla-µT (microteslas). This unit is named after Nikola Tesla, the inventor of the Tesla coil and developer of the induction motor.

### How strong are normal magnetic fields compared to those detected by eTesla?

Normal Earth emissions are around 20-40 µT. eTesla can detect high magnetic fields reaching up to 200 µT near speakers, and over 300 µT near electric motors.

### Can eTesla help protect my devices?

Yes, eTesla can help you identify areas with high magnetic fields, which can potentially damage credit cards and mechanical watches. By finding and avoiding these strong fields, you can protect your belongings.

### How do I recalibrate eTesla's sensor?

If your phone has been exposed to a high magnetic field, the sensor may need recalibration. Simply shake your phone until the data reader returns to a normal range.

### Does eTesla have an alarm feature?

Yes, eTesla features an alarm that can be set using a slider. When the measured magnetic field exceeds the set value, the reading turns red and your phone will vibrate.

### Is eTesla available on Android devices?

Based on the provided data, eTesla is currently supported on iPhone and iPod devices. Information regarding Android compatibility is not available.

### How often is eTesla updated?

eTesla was last updated on November 21, 2014, with version 1.0. The app has not received updates since its initial release date.

## Version history (last 1 release)

### 1.0 — 2014-11-21

This app has been updated by Apple to display the Apple Watch app icon.

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## Related topics

[etesla](https://appshunter.io/ios/topics/etesla) · [acarscientificcalculator](https://appshunter.io/ios/topics/acarscientificcalculator)

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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 2026-06-02.*