# Magnetic Tool — Test AC & DC Solenoid Coils

> Mobile tool for testing solenoid valve coils using smartphone sensors. (iPhone/iPad app by Danfoss A/S.)

- Source: https://appshunter.io/ios/app/magnetic-tool/id1397370458 (this page in markdown: same URL + `.md`)
- Developer: [Danfoss A/S](https://appshunter.io/developer/423984644)
- Category: Business, Utilities
- Price: Free
- Rating: 2.80/5 from 18 App Store ratings · 21 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.0 · 53 MB
- Released: 2018-07-24
- Data updated: 2026-06-09
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/magnetic-tool/id1397370458/reviews.md

## What is Magnetic Tool?

Magnetic Tool is now part of the new Ref Tools app, our essential, all-in-one mobile app for air conditioning and refrigeration technicians. Ref Tools gives you access to the tools, guidance, support, and information you need—on the job and in the field.    
  
Download Ref Tools to access the latest version of Magnetic Tool.   

Ensuring that a solenoid valve coil is working properly, or detecting a faulty one, is an important step in many repair or installation projects. Magnetic Tool makes testing a solenoid valve coil quick and easy. Just open the app, hold your smartphone up to the solenoid coil you want to test, and watch for the wheel in the app to start spinning. If it rotates, your solenoid valve is good to go.

If a solenoid valve is in a tough-to-reach space, you can also set Magnetic Tool to provide audio or haptic (or both) feedback when it detects a magnetic field. That way, you can check on a valve without seeing your screen, so you can maneuver your phone any way you need to.

Magnetic Tool has two modes: Simple and Advanced. With Simple mode, all you need to do is open the app and start testing—it's that simple. Advanced mode allows you to adjust the threshold tolerances of the magnetometer, which is most often used to reduce or eliminate interference from other nearby solenoid valves. 

Magnetic Tool is part of the Danfoss CoolApps Toolbox, a collection of mobile apps designed to help installers and service technicians with their daily tasks. See the full collection at CoolApps.Danfoss.com. 

Support 
For app support, please use the in-app feedback function found in the app settings or send an email to coolapp@danfoss.com 

Engineering Tomorrow 
Danfoss engineers advanced technologies that enable us to build a better, smarter and more efficient tomorrow. In the world’s growing cities, we ensure the supply of fresh food and optimal comfort in our homes and offices, while meeting the need for energy-efficient infrastructure, connected systems and integrated renewable energy. Our solutions are used in such areas as refrigeration, air conditioning, heating, motor control and mobile machinery. Our innovative engineering dates back to 1933 and today, Danfoss holds market-leading positions, employing 28,000 people and serving customers in more than 100 countries. We are privately held by the founding family. Read more about us at www.danfoss.com. 

Terms and Conditions apply for use of the app.

## Key features

- Solenoid coil testing
- Magnetic field detection
- Audio and haptic feedback
- Simple and Advanced modes
- Adjustable tolerance thresholds

## Recent user reviews (10 of 21)

All indexed reviews: https://appshunter.io/ios/app/magnetic-tool/id1397370458/reviews.md

### 5/5 — works like a charm

*2026-03-04*

picks up magnetic fields a little too well, i love the ability to change sensitivity and discern between AC and DC

### 1/5 — Terrible

*2023-03-07*

Terrible showed me wrong direction of fan motor. Unless I’m missing the point and it is suppose to show direction. If it doesn’t pretty pointless tool

### 5/5 — Richtig einstellen

*2023-01-29, version 2.4.0*

Zuerst funktionierte die App überhaupt nicht aber nach dem öffnen des Expertenmodus und runterregelung des Schwellwertes , also eben etwas feiner das Magnetfeld abtasten funktioniert das Tool tadellos 👍🏻

### 5/5 — Funktioniert doch

*2021-11-01, version 2.4.0*

Erst hat sich ständig der Kreis gedreht..dann habe ich das I Phone aus der Magnetischen Hülle genommen und kurz den Flugmodus angemacht..danach funktioniert die App..

### 1/5 — Naja

*2021-02-18, version 2.4.0*

Habe ein aktuelles iPhone 12 pro Max und bei nicht einer Pumpe funktioniert die App. In verschiedenen Größen und verschiedenen Baujahren. Leider. Wäre zu schön gewesen.

### 1/5 — Does not work on iPhone 11

*2020-02-05*

Had an iPhone 8+ and the app worked great. I got a new iPhone 11 and now the app does not work at all.

**Developer response:** Hi, 
We are very sorry you were experiencing trouble with our app. We have released a new version of it today, and hope that this will resolve your issue. Please do not hesitate to reach out to us either here or via email at coolapp@danfoss.com if you continue to experience problemsDear Sir,

### 5/5 — What a great app.

*2019-11-24*

I have enjoyed using this app love my coworkers / customer reactions every time. “Wow what thats do” , i just asked that the app have an update for us magnet freaks and have a pole induction N or S but that’s for another hobby. I have had 1 problem w: app that was fixed Thru Font had changed it to small then app no work.

**Developer response:** Hi, thank you for your feedback. We are very happy you (and your coworkers and customers, it seems) are enjoying the app. We have noted that you would like the pole indication included and we will consider adding it in a future update to the app. Should you have any more improvement suggestions, please do not hesitate to get back in touch with us.

### 1/5 — Don’t work and freezes at the start

*2019-09-24*

This app doesn’t even work on my XS. Freezes as soon as you open it. Have to slide the screen up to make it start like I’m closing my page. Freezes and just goes back to the Home page. Any other apps besides this faulty one?!?!

**Developer response:** Hi, 
We are very sorry you were experiencing trouble with our app. We have released a new version of it today, and hope that this will resolve your issue. Please do not hesitate to reach out to us either here or via email at coolapp@danfoss.com if you continue to experience problems

### 5/5 — Crashes on iOS 12.4

*2019-08-12, version 1.0.5*

Great app, but no longer works with latest Apple update on iPhone 6S.

### 5/5 — Works great.

*2019-06-08, version 1.0.3*

Good job danfoss. Very handy.

## Frequently asked questions about Magnetic Tool

### How does Magnetic Tool test solenoid coils?

Magnetic Tool uses your smartphone's sensors to detect magnetic fields. When you hold your phone near a solenoid coil, the app's wheel spins if it detects a magnetic field, indicating the coil is working.

### What are the modes in Magnetic Tool?

Magnetic Tool offers a Simple mode for quick testing and an Advanced mode. Advanced mode allows you to adjust magnetometer tolerance thresholds to reduce interference from other solenoid valves.

### Can Magnetic Tool provide feedback without visual confirmation?

Yes, if a solenoid valve is in a difficult-to-reach location, Magnetic Tool can be set to provide audio or haptic feedback, or both, when it detects a magnetic field.

### Is Magnetic Tool available on all devices?

Magnetic Tool is available for iPhone, iPad, and iPod devices. It is designed to be an essential mobile app for technicians on the go.

### How often is Magnetic Tool updated?

The latest version of Magnetic Tool is 2.4.0, which was last updated on February 4, 2021. Updates ensure the app remains functional and reliable for users.

### What is the user rating for Magnetic Tool?

Magnetic Tool has a rating of 2.8 stars from 18 ratings. This indicates a mixed user reception, with opportunities for improvement.

### Where can I get support for Magnetic Tool?

For app support, you can use the in-app feedback function found in the app settings or send an email to coolapp@danfoss.com. Danfoss provides dedicated support for their CoolApps Toolbox.

### Is Magnetic Tool part of a larger suite of tools?

Yes, Magnetic Tool is part of the Danfoss CoolApps Toolbox, a collection of mobile applications designed to assist installers and service technicians with their daily tasks.

## Version history (last 5 releases)

### 2.4.0 — 2021-02-04

Improved threshold for calibration
Warning that the app will only run on supported devices
Changes and improvements

### 2.3.1 — 2020-07-07

Improvements and bug fixes

### 2.2.0 — 2020-06-02

- Improvements and bug fixes

### 2.1.0 — 2020-05-15

- Updated look and feel
- Simple mode introduced
- Audio and haptic feedback implemented
- 17 additional languages added
- Fix issue that cause app to crash on devices without magnetometer

### 2.0.1 — 2020-05-06

- Updated look and feel
- Simple mode introduced
- Audio and haptic feedback implemented
- 17 additional languages added
- Improvements and bug fixes

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## More apps by Danfoss A/S

- [Installer App](https://appshunter.io/ios/app/installer-app/id423984641)
- [Ref Tools](https://appshunter.io/ios/app/ref-tools/id472312541)
- [ECL Comfort 310 Portal](https://appshunter.io/ios/app/ecl-comfort-310-portal/id486704541)
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- [KoolCode](https://appshunter.io/ios/app/koolcode/id563222728)
- [Danfoss Spare Parts](https://appshunter.io/ios/app/danfoss-spare-parts/id584338203)

All apps by Danfoss A/S: https://appshunter.io/developer/423984644

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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 2026-06-09.*