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  • Feb 18, 2026
    Update date
  • 0/66
    Security
  • Everyone
  • Android 5.0+
    Android OS

About CrowdMag

Use compass, get magnetic variation, record mag data and be a citizen scientist!

Introducing CrowdMag's newest feature: Flight Mode, which lets you contribute to scientific research by measuring the magnetic field as you fly around the world. To get started, simply provide your itinerary on the CrowdMag app, and you'll be able to turn your flight into a scientific expedition. Check out this step-by-step tutorial for measuring data while flying: https://geomag.colorado.edu/crowdmag-flight-mode-tutorial .

CrowdMag is an app that lets you measure the local magnetic field using your smartphone. You can view the data as a graph or a map in nanotesla units. CrowdMag measures the Z (downward component), H (horizontal intensity), and F (total intensity) magnetic field components. You can use CrowdMag for measuring magnetic data during outdoor activities, while flying, or to conduct your own experiments. You can also share it with NOAA to help scientists better understand Earth's magnetic field.

If you're going for a walk, run, or other outdoor activities, you can use CrowdMag to measure the magnetic data along your path and save it as a "magtivity." And, if you get a new phone, don't worry! You can export a backup of your CrowdMag data and save it on your computer. This way, if you have to reset your phone or switch to a new one, you can import your backup and continue using CrowdMag without losing your data or progress.

CrowdMag also has a magnetic calculator that provides magvar (declination), the magnetic field's dip angle, total magnetic field, and other magnetic field components based on the latest World Magnetic Model (WMM2020). Some of the other features of CrowdMag include creating your own magtivities, customizing recording frequency and location accuracy, exporting your data via email or Google Drive, and seeing generalized crowdsourced magnetic data from other users.

And, before we forget, CrowdMag also features a compass that distinctly shows both true and magnetic north. As an added feature, the compass also has a 3D display with an optional audio output - check it out!

CrowdMag features:

* Create your own magnetic activity (called a "magtivity")

* Measure data while flying

* Customize recording frequency and location accuracy to your preferences

* View your magnetic data on an interactive Google Map

* Graph your data as a time series line chart

* Check the quality of your data by comparing it with the World Magnetic Model (WMM)

* Export your data as a CSV file

* Clear stored data on your phone when you want to start fresh

* Choose to share your data with NOAA (optional)

* See generalized crowdsourced magnetic data from other users

* Use the live magnetic compass for 2D and 3D rendering

* View information about the current solar magnetic disturbance

* Use the most up-to-date magnetic field model (WMM2020)

* Export your data via email, Google Drive, or other options

* Export a CrowdMag backup to save your contributions' status and data

* Import your CrowdMag backup (works across different phone platforms)

Visit https://geomag.colorado.edu/crowdmag to see crowdsourced magnetic data.

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Additional APP Information

Latest Version

2.2.6

Uploaded by

Bhuvaneswar Reddy

Requires Android

Android 5.0+

Available on

Content Rating

Everyone

Security Report

What's New in the Latest Version 2.2.6

Last updated on Feb 18, 2026

* Updating send feedback email to crowdmag@colorado.edu

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0/66
Scan Result: Secure
No security vendors flagged this file as malicious
No Virus
No Spyware
No Malware
No Virus
No Spyware
No Malware
Scan Date:Feb 21, 2026
Package Name:gov.noaa.ngdc.wmm2
SHA-256:9a894c7978b4a8c12cc9dc8604b1c41844646560bdc59135483e7dd5f650edb9
SHA-1:34bba17f4be21be8819c7f2057fe920f4353ba91
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View Security Report

CrowdMag Screenshots

CrowdMag posterCrowdMag screenshot 1CrowdMag screenshot 2CrowdMag screenshot 3CrowdMag screenshot 4CrowdMag screenshot 5CrowdMag screenshot 6CrowdMag screenshot 7

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