Comparison

CrowdMag vs CampbellGo

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

CrowdMag

This app allows users to measure and contribute to scientific research on Earth's magnetic field using their smartphone. It offers features for recording magnetic data during various activities, including flights, and provides tools for data visualization and analysis.

Highlights
  • Measure magnetic field data
  • Contribute to scientific research
  • Record data during flights
  • Visualize data on maps and graphs
  • Magnetic calculator with WMM2020
  • Live magnetic compass
  • Export data via email/Google Drive
Features
Read full 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 .

About

CampbellGo

This utility app securely pairs mobile devices with CampbellCloud-enabled Edge Devices via NFC/Bluetooth. It ensures seamless field-to-cloud data flow for device deployment, service, and maintenance. Users can also remotely access the most recent data sent to the cloud.

Highlights
  • Secure NFC/Bluetooth pairing
  • Field-to-Cloud confidence
  • Device deployment facilitation
  • Service and maintenance support
  • Remote data viewing
Features
Read full description

CampbellGo™ (Go) is a companion field app to CampbellCloud™ (Cloud). Go enables secure NFC/Bluetooth pairing between a mobile device and a CampbellCloud-enabled Edge Device. This gives you confidence that everything is working from field-to-Cloud before leaving the installation site. CampbellGo facilitates device deployment, service, and maintenance. With Go you can also view, from anywhere, the most recent data sent to CampbellCloud.

Screenshots

CrowdMag4 screens
CampbellGo4 screens

Verdict

The call

The clearest difference is review sentiment: CampbellGo at 100% against CrowdMag's 53%. CampbellGo also leads on rating (5.0 vs 4.3). CrowdMag's advantage is update cadence (every 2 months vs every 4 months) and ratings volume (24 vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

CampbellGo holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: CrowdMag has 24 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 53% of CrowdMag's written reviews are positive against 100% of CampbellGo's.

UpkeepUpdate frequency

CrowdMag ships an update every 2 months, CampbellGo every 4 months. The most recent releases landed on September 22, 2026 and September 8, 2026 respectively.

Scorecard4 real differences · 6 level
CrowdMag versus CampbellGo: the parameters behind the verdict, then further details
ParameterCrowdMagCampbellGo
PriceFreeFree
Rating4.3 (24 ratings)5.0 (2 ratings) — better
Positive reviews52.9% of reviews100.0% of reviews — better
Number of ratings24 — better2
Update frequencyEvery 2 months — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.6
Further details — not scored
Size18 MB48 MB
Age rating4+4+
DeveloperUniversity of Colorado BoulderCampbell Scientific

Customer experience

CrowdMag

All ratings24 ratings
Positive79.2%
Neutral8.3%
Negative12.5%
Written reviews17 reviews
Positive52.9%
Neutral17.6%
Negative29.4%

CampbellGo

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

CrowdMag

No in-app purchases

None

CampbellGo

No in-app purchases

Questions

Is CrowdMag free?
CrowdMag is free to download, with no in-app purchases.
Is CampbellGo free?
CampbellGo is free to download, with no in-app purchases.
Which has better reviews, CrowdMag or CampbellGo?
CampbellGo is rated higher. CrowdMag averages 4.3 out of 5 from 24 ratings, while CampbellGo averages 5.0 from 2 ratings.
Do CrowdMag or CampbellGo have ads?
Neither CrowdMag nor CampbellGo shows ads.
Which is updated more often, CrowdMag or CampbellGo?
CrowdMag ships an update every 2 months, and CampbellGo every 4 months. Most recently, CrowdMag was updated on September 22, 2026 and CampbellGo on September 8, 2026.

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