Gauss Meter vs CrystalGen
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Gauss Meter
Measure magnetic field strength and detect metals using your device's sensors. Visualize data in real-time, customize alerts, and map measurement points. Export data and attach media for detailed analysis.
- Magnetic field measurement
- Real-time data plotting
- Multiple unit support
- Customizable alerts
- Map measurement points
- Data export to CSV
- Attach photos, videos, voice records
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This app is primarily used to measure magnetic field strength all around. It could also be used as a metal detector. This app contains the following features: 1) The magnetic field measured by this app is the total magnetic field in the device's vicinity without device bias (Earth's magnetic field plus surrounding fields, without device bias). 2) Plot the measured data in real time. 3) Multiple units supported: nT, µT, mT, mG and G. 4) Measurement duration and measurement frequency are customizable. 5) Users could set alert value to some level (Ex. 120 µT). When the measured magnetic field exceeds the alert value, it will alert users. 6) The location information of the measurement points could also be obtained, and all the measurement points could be shown in map. 7) All measured data could be exported as a csv format file for post process. 8) In addition, users could also add photos, videos and voice records to the measured data, and the photos, videos and voice records could be downloaded through iTunes.
CrystalGen
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Visualize minerals from basic crystallographic information. Symmetry, unit cell dimension, and habit
Screenshots
Verdict
The clearest difference is update cadence: Gauss Meter at every 2 months against CrystalGen's every 38 months. Gauss Meter also leads on price ($1.99 vs $2.99) and iOS requirement (13.0 vs 17.2). 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
Gauss Meter costs $1.99 and CrystalGen $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Gauss Meter ships an update every 2 months, CrystalGen every 38 months. The most recent releases landed on October 15, 2026 and October 19, 2026 respectively.
| Parameter | Gauss Meter | CrystalGen |
|---|---|---|
| Price | $1.99 — better | $2.99 |
| Rating | 3.0 (10 ratings) — better | — |
| Positive reviews | 75.0% of reviews | — |
| Number of ratings | 10 — better | — |
| Update frequency | Every 2 months — better | Every 38 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.2 |
| Further details — not scored | ||
| Size | 5 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | HUNG HSUN LIN | Steve Kliewer |
In-app purchases
Gauss Meter
No in-app purchases
CrystalGen
No in-app purchases
