← Back to charts
CrowdMag icon
APP STORE

CrowdMag

University of Colorado Boulder · Utilities · United States store
NOT IN TOP 100 HERE
View on App Store ↗ Instagram card Google Play version →
Revenue a month, worldwide
Too small to estimate
Not enough chart or ratings data
New ratings
Tracking
Daily counts start building from today
Rating
4.3 of 5
25 ratings in this store
Countries it ranks in
0
was 0 on Oct 17, 2026

Revenue

Estimated from the grossing charts of Oct 23, 2026 in the 53 countries we track, and ratings growth on the App Store.

EST. REVENUE / MONTH · WORLDWIDE
Unranked
Not in any grossing chart, and it sells nothing in the store (no in-app purchases, free download). Any revenue comes from ads or payments outside the store, which we can't see.
EST. LIFETIME DOWNLOADS
875 to 2.5K
Estimated from ratings count
RATINGS
25
AVG RATING
4.32
PRICE
Free
AGE
12.1y
LAST UPDATE
71d ago
VERSION
2.3.0
SIZE
18 MB
AGE RATING
4+

Last 30 days

From our daily snapshots of every grossing chart.

DAYS IN A GROSSING CHART
0 / 30
COUNTRIES NOW
0 (was 0)
EST. REVENUE FROM CHARTS, DAILY · BOTH STORES ONLY EST
Show daily values
Sep 25, 2026not in a grossing chart
Sep 26, 2026not in a grossing chart
Sep 27, 2026not in a grossing chart
Sep 28, 2026not in a grossing chart
Sep 29, 2026not in a grossing chart
Sep 30, 2026not in a grossing chart
Oct 1, 2026not in a grossing chart
Oct 2, 2026not in a grossing chart
Oct 3, 2026not in a grossing chart
Oct 4, 2026not in a grossing chart
Oct 5, 2026not in a grossing chart
Oct 6, 2026not in a grossing chart
Oct 7, 2026not in a grossing chart
Oct 8, 2026not in a grossing chart
Oct 9, 2026not in a grossing chart
Oct 10, 2026not in a grossing chart
Oct 11, 2026not in a grossing chart
Oct 12, 2026not in a grossing chart
Oct 13, 2026not in a grossing chart
Oct 14, 2026not in a grossing chart
Oct 15, 2026not in a grossing chart
Oct 16, 2026not in a grossing chart
Oct 17, 2026not in a grossing chart
Oct 18, 2026not in a grossing chart
Oct 19, 2026not in a grossing chart
Oct 20, 2026not in a grossing chart
Oct 21, 2026not in a grossing chart
Oct 22, 2026not in a grossing chart
Oct 23, 2026not in a grossing chart
Oct 24, 2026not in a grossing chart
Best rank Sep 25, 2026: not ranked. Now: not ranked. Days at zero are days outside every grossing chart.

Money and momentum

Measured from the store, not estimated.

WHAT IT CHARGES
No in-app purchases
Earns from its upfront price, ads or payments outside the store.
REVIEW MOMENTUM
0.0 reviews / week
  • Recent reviews average3.5 stars
  • Recent 1 and 2 star share25%
From the latest 12 written reviews, covering 4130 days.
RELEASE CADENCE
1 update in 90 days
  • Typical gap between releases48 days
From the last 25 versions listed on the App Store.
RATING BREAKDOWN
25 ratings
5★76%
4★4%
3★8%
2★0%
1★12%

What users want

From the latest 12 reviews on the United States App Store, Jul 4, 2015 to Nov 23, 2024: 25% are 1 or 2 stars. Open a theme to read what people wrote.

WHAT THEY COMPLAIN ABOUT · SHARE OF BAD REVIEWS

Only 3 of the latest 12 reviews are 1 or 2 stars, too few to find patterns. Users are mostly happy.

WHAT THEY ASK FOR
  • I'm always appreciative of being given opportunities to contribute to wards citizen science, I just wish they'd give the UI on this app an update. 3★, Mar 24, 2023
WORDS THAT KEEP COMING UP IN BAD REVIEWS

Nothing stands out.

WHAT THEY LOVE · SHARE OF GOOD REVIEWS
Useful, it helps33%

2 of the 4 and 5 star reviews.

★★★★★ I don't understand it but it seems really cool and useful for researchers and Chat gpt actually recommended it to me.
★★★★★ I love this app. I'm out in the field a lot and this app allows for quick calibration of my compasses.

Found by matching words and phrases in the reviews, not read by a person. A review can count toward more than one theme.

What users say

Latest reviews, United States App Store.

★★★★★Nov 23, 2024
I’m dumb but I’m sure it’s useful🤷🏼‍♂️

I don’t understand it but it seems really cool and useful for researchers and Chat gpt actually recommended it to me. This is now gonna be my compass app.

★★★★★Oct 10, 2024
Terrible app

This is king Jack and it doas not do what it was supposed it was glitchy and not correct no one should use this app it’s terrible

★★★★★Mar 24, 2023
Needs a slight facelift

I’m always appreciative of being given opportunities to contribute to wards citizen science, I just wish they’d give the UI on this app an update. It looks best on an iPhone 4 screen. There’s so much more potential with an interface update.

★★★★★Aug 31, 2019
Seems cool....but setting options need work

I am unable to enable background recording because my location data isn’t set to “Always” but I don’t have an “Always” option for the app in setting. Only Never and While Using App.

★★★★★Mar 9, 2019
No location

iPhone XS Max —- doesn’t grab GPS location. I emailed back and forth with support. Known bug. Fix for 5 stars.

★★★★★Feb 19, 2019
1.7.5 cannot take location from at least some iPhones

iPhone 5s 32GB iOS 12.1.4 App never acquires location data from the phone and therefore never records data. I reported this to NOAA just last week. It would be interesting to hear from people using newer, more capable iPhones, although no mention is made of any limitations on older phones. Makes a very nice compass app though.

Store screenshots

ScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshot

App Store ads

Apple Search Ads this app ran in the last 90 days, from Apple's public ad repository.

No App Store ads in the EU
None in the last 90 days.

Apple only publishes ads shown in the EU (EU Digital Services Act), with a 7 day delay. An app that advertises only outside the EU shows nothing here.

Growth research

Where this app is buying and earning its users. Each link opens pre filtered.

ASO keywords

Most repeated terms in the listing. Highlighted ones also appear in the title.

magnetic21data19crowdmag16magnetic field13magnetic data10field8crowdsourced magnetic5phone4export4backup4flight mode3measuring magnetic3data flying3geomag colorado3colorado edu3edu crowdmag3field components3outdoor activities3world magnetic3magnetic model3model wmm20203recording frequency3frequency location3location accuracy3

What's new in 2.3.0

* Fully migrating to University of Boulder Colorado servers

Released Oct 7, 2014. Current version shipped Aug 14, 2026.

Store description

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 .

See this store page in another country

Prices, ranks and reviews are per country. Revenue above is already worldwide.

More from University of Colorado Boulder

CU Boulder Life
Business
18 ratingsAnalyze →
PhET Simulations
Education
48 ratingsAnalyze →
SOS Explorer
Education
20 ratingsAnalyze →
CU Boulder Safe
Education
0 ratingsAnalyze →
CU Boulder Wise Law Library
Education
0 ratingsAnalyze →
BATP Collect
Education
3 ratingsAnalyze →
Science at 100,000 Feet
Education
0 ratingsAnalyze →
Project SPECTRA!
Education
0 ratingsAnalyze →
Citizen Sky View
Education
1 ratingsAnalyze →