# iPhasematch vs Gauss Meter

The clearest difference is price: iPhasematch at Free against Gauss Meter's $1.99. iPhasematch also leads on rating (5.0 vs 3.0). Gauss Meter's advantage is update cadence (every 2 months vs every 7 months) and ratings volume (10 vs 2). On ads, in-app purchases and device support there is nothing between them.

iPhasematch is free to download; Gauss Meter costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

iPhasematch holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: Gauss Meter has 10 ratings behind it against 2, so its average is the more settled of the two.

iPhasematch ships an update every 7 months, Gauss Meter every 2 months. The most recent releases landed on October 7, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | iPhasematch | Gauss Meter |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/iphasematch/id492370060/reviews)** | [3.0 (10 ratings)](https://appshunter.io/ios/app/gauss-meter/id698042661/reviews) |
| Number of ratings | 2 | **10** |
| Positive reviews | — | 75.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | **Free** | Paid |
| Size | 6 MB | 5 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yushi Kaneda](https://appshunter.io/developer/492370063) | [HUNG HSUN LIN](https://appshunter.io/developer/482586427) |

## What reviewers say

### iPhasematch

[App page](https://appshunter.io/ios/app/iphasematch/id492370060)

Calculate nonlinear optical effects like second-harmonic generation and spontaneous parametric down-conversion. This app provides phasematching orientations, nonlinear coefficients, and tolerance values for various crystals based on Sellmeier equations.

**Highlights:** Phasematching condition calculation, Sellmeier equation integration, Effective nonlinear optical coefficients, Walk-off and angular tolerance, Temperature tolerance, Supported crystal list

**Features:** macOS Compatibility

**In-app purchases:** none


### Gauss Meter

[App page](https://appshunter.io/ios/app/gauss-meter/id698042661)

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.

**Highlights:** Magnetic field measurement, Real-time data plotting, Multiple unit support, Customizable alerts, Map measurement points, Data export to CSV, Attach photos, videos, voice records

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is iPhasematch free?

iPhasematch is free to download, with no in-app purchases.

### Is Gauss Meter free?

Gauss Meter costs $1.99, with no in-app purchases.

### Which has better reviews, iPhasematch or Gauss Meter?

iPhasematch is rated higher. iPhasematch averages 5.0 out of 5 from 2 ratings, while Gauss Meter averages 3.0 from 10 ratings.

### Do iPhasematch or Gauss Meter have ads?

Neither iPhasematch nor Gauss Meter shows ads.

### Which is updated more often, iPhasematch or Gauss Meter?

iPhasematch ships an update every 7 months, and Gauss Meter every 2 months. Most recently, iPhasematch was updated on October 7, 2026 and Gauss Meter on September 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*