Comparison

CrowdMag vs SoulTuner

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
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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 .

About

SoulTuner

Features
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SoulTuner provides a simple way for you to explore the effects of binaural beats where each ear receives a slightly different frequency. This is said to produce feelings of relaxation or greater focus depending on the settings. Use the knobs to adjust the base (Carrier) frequency to one that feels right for you. Optionally, add harmony voices and reverb for a fuller sound or listen to a complex harmony of drones all by itself. Features —Pure binaural sine waves, one for each ear in headphones —Music toggle to switch to musical notes instead of raw frequencies —Toggle to swap left and right for binaural sources —Up to 25 additional color-coded interval harmony drones over two octaves (but less is often more) —Add automated panning to gently move drones around —Add reverb for fuller spacial sound —Change harmony drone voices —Create ambient noise of various pleasing types: Pink, Brown, Green, Gray, White and add a slow sweep to change it —Add a low slow pulse synchronized to the other audio for extra relaxation —Use a timer to turn everything off after awhile, good for a sleep setting —Can run in the background while you do other things or have your device screen off Uses —Explore relaxation and focus properties of binaural audio —Find frequencies that feel right for you —Use the massive drone stack out to a recording device

Screenshots

CrowdMag4 screens
SoulTuner4 screens

Verdict

The call

The clearest difference is price: CrowdMag at Free against SoulTuner's $0.99. CrowdMag also leads on iOS requirement (15.0 vs 18.6). SoulTuner's advantage is update cadence (every 5 days vs every 2 months). On ads, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

CrowdMag is free to download; SoulTuner costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

CrowdMag ships an update every 2 months, SoulTuner every 5 days. Both last shipped on November 1, 2026.

Scorecard3 real differences · 7 level
CrowdMag versus SoulTuner: the parameters behind the verdict, then further details
ParameterCrowdMagSoulTuner
PriceFree — better$0.99
Rating4.3 (25 ratings) — better—
Positive reviews52.9% of reviews—
Number of ratings25 — better—
Update frequencyEvery 2 monthsEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better18.6
Further details — not scored
Size18 MB3 MB
Age rating4+4+
DeveloperUniversity of Colorado BoulderTechné Media

In-app purchases

None

CrowdMag

No in-app purchases

None

SoulTuner

No in-app purchases

Questions

Is CrowdMag free?
CrowdMag is free to download, with no in-app purchases.
Is SoulTuner free?
SoulTuner costs $0.99, with no in-app purchases.
Do CrowdMag or SoulTuner have ads?
Neither CrowdMag nor SoulTuner shows ads.
Which is updated more often, CrowdMag or SoulTuner?
CrowdMag ships an update every 2 months, and SoulTuner every 5 days. Most recently, CrowdMag was updated on November 1, 2026 and SoulTuner on November 1, 2026.

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