CrowdMag vs Compass Maps
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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 .
Compass Maps
Navigate with a digital compass that displays direction on a map. Features include real-time traffic, land area measurement, and location sharing. It utilizes GPS for auto-direction and allows map interaction.
- Digital compass on map
- Real-time traffic maps
- Land area measurement
- Location sharing
- GPS auto-direction
- Satellite map mode
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Maps compass - directional compass & digital is free the application to support show compass on the map, Traffic maps in real time, Land area measurement, show address on maps with satellite map mode and share location to networks social, email, sms or for any app you like. With GPS technology the application will auto direction compass for you. - You can move on maps , compass will auto update state and direction, It also can calculate radius, corner. show your current location on maps. zoom maps or share location with your friends *Note: + E is east + W is the west + N is the north + S is the south + SE is the Southeast + SW is Southwest + NE is North-East - You need to grant permission and turn on the GPS. Here is a request with any application that supports digital compass. The compass app depends on connecting to wifi/internet for your device exactly. If the compass works perfectly, it means that your internet is perfect, too. - Compass map: + Locate or calculate direction at anywhere appears on map + Move the compass by touching the location you want on the map. Some other feature for Compass Maps - Directional Compass application - Show True North - Show Magnetic Field Power - Level Error Correction - Connect To Google Map - Show latitude longitude - Show level Maps compass - Directional Compass also is a tool to measure calculators for measuring Land Area on maps easiest way. There is an inbuilt Unit Converter for measuring areas in various Land Units. Supported m2, km2, fit2 and ha. You can convert these units. Measure area between three points on map. The application will auto calculate and figure out the result. You can choose some types such as: hybrid maps, satellite, terrain maps... Land Area measurement easiest way tools. It allows you to use pivots to operate on maps. If you have any feedback to build maps compass - directional compass application. Please contact me via email: onedevzteam@gmail.com. We will research and improve it to become better for our smart compass application. Thanks. Privacy Policy: https://compassmaps.wordpress.com/here-is-privacy-policy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: CrowdMag at none against Compass Maps's 2. Compass Maps's advantage is rating (4.6 vs 4.3) and ratings volume (670 vs 25). On price, review sentiment, update cadence and ads 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
Both are free to download. Compass Maps sells 2 in-app purchases, starting at $7.99 per year. CrowdMag asks for nothing beyond the download.
Compass Maps holds the better App Store score, 4.6 against 4.3. That said, the two scores are not equally well evidenced: Compass Maps has 670 ratings behind it against 25, 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 56% of Compass Maps's.
CrowdMag ships an update every 2 months, Compass Maps every 4 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | CrowdMag | Compass Maps |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (25 ratings) | 4.6 (670 ratings) — better |
| Positive reviews | 52.9% of reviews | 55.6% of reviews — better |
| Number of ratings | 25 | 670 — better |
| Update frequency | Every 2 months | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 18 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | University of Colorado Boulder | KIET NGUYEN TAN |
Customer experience
CrowdMag
Compass Maps
In-app purchases
CrowdMag
No in-app purchases
Compass Maps
- Remove Ads (Yearly)$7.991 Year
- Remove Ads – Lifetime$12.99









