This app is aimed to mechanical watch lovers who'd like to know if their watches are magnetized or not.

How can I tell that my watch is magnetized?

If your watch is running fast or slow, this can be a sign of magnetism. To be sure, this app has been made for you. With LEPSI Watch MAGNETISM, you can run a diagnostic on your watch’s magnetism in a few seconds.

First detect the position of the magnetic sensor on your iPhone/iPad (you only have to do this the first time):

1. Place your iPhone/iPad on a table
2. Place a magnet above the iPhone/iPad and move it around the screen without touching the device.
3. Observe the magnetic strength displayed by the app
4. The higher the number, the closer the magnet is to the sensor.
5. Once you’ve found the sensor, double click on the identified area.
6. The sensor’s position will be represented by a circle.

After you have pinpointed the sensor, you can measure your watch’s magnetism:

1. Click on Start and wait 3 seconds.
2. Put your watch about 1 cm away from the sensor without having it touch the screen.
3. If the message Magnetism detected shows up, your watch is magnetized and if not, your watch is fine.

And that's all !!!

What’s New

Version 1.12

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

Magnetism sensibility has been decreased to match most manufacture standard.

Ratings and Reviews

3.5 out of 5
26 Ratings

26 Ratings


Detector of ferrous metal, and maybe magnetized watches.

Firstly, the app works nicely for what it is. But it should be known that the compass chip in the iPhone will, like any compass, be affected by ANY ferrous metal. Whether that ferrous metal object is magnetized or not. So if the app tells you that your mechanical watch is "magnetized", you are more than likely getting attraction to a ferrous part (the strap springbar or clasp are likely culprits). If no strap, then the mainspring or small screws & parts may be enough to pull the compass, even if not magnetized. If you're demagnetizing over & over and still getting a "magnetized" reading, this is why. Perhaps watch the strength level, if it drops, you may have removed some magnetic contamination, but you'll always get "some" reading from clean steel, if present. All similar apps like this work this way, so not a problem, so long as you are aware.

RicPax ,

I’m actually impressed.

I downloaded this thinking that my automatic watch may be running fast due to it possibly being magnetized. It asks you to verify your phones ability by running a magnet above your phone. (Don’t be dumb and put it too close) I took the weakest magnet off my fridge (barely holds 1 coupon) and made an arc movement over the phone and it detected it immediately. Took the watch and held it over the phone and nothing was detected. So I saved myself the money of having to buy a demagnetizer. Watch just needs a tune.
Phone: iPhone 8
Watch: Bulova Accu-Swiss Gemini 64B123

Newton 2000 ,

Works like a CHARM!

This app definitely deserves a 5 Star rating. It is so sensitive that even if the watch falls under manufacturing parameters it will still pick up the magnetism exhibited by the timepieces. Easy to set up and configure, but once configured can be used to measure not only watches but also the places where the watches are kept. Need to make sure where you store the watches is not the source of any magnetism. RECOMMEND HIGHLY!

App Privacy

The developer, Davy Pillet, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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