CrowdMag vs Snow Scope App
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
Read full descriptionHide 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 .
Snow Scope App
Easily record, view, analyze, and share snowpack data including profiles, test results, and height measurements. Syncs data to the cloud for real-time organization and historical tracking. Supports hands-free recording and integration with specialized probes.
- Record snow profiles, test results, and height measurements
- Hands-free recording with voice-to-pit and audio notes
- Cloud sync for real-time data sharing and historical database
- Web and mobile app access
- Filtering, spatial viewing, and analysis tools
- Export observations to other platforms
- Integrates with Snow Scope Probes for rapid quantification
Read full descriptionHide full description
The Snow Scope App is the easy and FREE way to create, view, analyze, and share all kinds of snowpack data: snow profiles, snowpack test results, snow height measurements, and automated profiles from Snow Scope Probes. - A simple yet powerful interface allows snow profile recording in the field, and "voice to pit" and audio notes functions allow hands free profile recording! Simple enough for novices, yet detailed enough for professionals: all OGRS and SWAG fields are included! - Backed by the power of the Propagation Labs Snow Database, your data is seamlessly synced to the cloud and across your organization, sharing snowpack observations in real time and creating a historical database for all your snowpack obs in one place! - Record, edit, or view observations in field on the mobile app or inside on the equally powerful and intuitive web app. - Powerful filtering, spatial viewing, and analysis tools allow you to see all your snow data in one place and draw insights about the snowpack. - Simple export tools allow you to share your snowpack observations to other platforms. - Help out the snow science community by measuring snow height observations to be shared with the Community Snow Observations project! - Rapidly quantify spatial variability and measure objective snow profiles by using the app with a "Snow Scope Probe" - instantly visualize probe measurements in the field. Propagation Labs is dedicated to building the best tools for snowpack data collection and analysis, and thrives on community input and feedback. If you have an idea or an issue to report, please reach out at contact@propagationlabs.com. Terms of Use : https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.propagationlabs.com/terms-and-privacy
Screenshots
Verdict
The clearest difference is rating: Snow Scope App at 5.0 against CrowdMag's 4.3. CrowdMag's advantage is in-app purchases (none vs 2) and ratings volume (24 vs 4). On price, update cadence, ads and device support 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. Snow Scope App sells 2 in-app purchases, starting at $8.99 per month. CrowdMag asks for nothing beyond the download.
Snow Scope App 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 4, so its average is the more settled of the two.
CrowdMag ships an update every 2 months, Snow Scope App monthly. The most recent releases landed on October 9, 2026 and October 6, 2026 respectively.
| Parameter | CrowdMag | Snow Scope App |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (24 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 52.9% of reviews | — |
| Number of ratings | 24 — better | 4 |
| Update frequency | Every 2 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 18 MB | 98 MB |
| Age rating | 4+ | 9+ |
| Developer | University of Colorado Boulder | Propagation Labs |
Customer experience
CrowdMag
Snow Scope App
In-app purchases
CrowdMag
No in-app purchases
Snow Scope App
- Snow Scope Pro Monthly14 Days trial$8.991 Month
- Snow Scope Pro Yearly14 Days trial$79.991 Year









