# iPhasematch vs Desert Storm Atlas

The clearest difference is update cadence: Desert Storm Atlas at every 3 weeks against iPhasematch's every 7 months. Desert Storm Atlas also leads on device support (4 vs 2). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

iPhasematch ships an update every 7 months, Desert Storm Atlas every 3 weeks. The most recent releases landed on November 1, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | iPhasematch | Desert Storm Atlas |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/iphasematch/id492370060/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 6 MB | 153 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Yushi Kaneda](https://appshunter.io/developer/492370063) | [PVI Maine LLC](https://appshunter.io/developer/384927995) |

## 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


### Desert Storm Atlas

[App page](https://appshunter.io/ios/app/desert-storm-atlas/id6790596195)

**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 Desert Storm Atlas free?

Desert Storm Atlas is free to download, with no in-app purchases.

### Do iPhasematch or Desert Storm Atlas have ads?

Neither iPhasematch nor Desert Storm Atlas shows ads.

### Which is updated more often, iPhasematch or Desert Storm Atlas?

iPhasematch ships an update every 7 months, and Desert Storm Atlas every 3 weeks. Most recently, iPhasematch was updated on November 1, 2026 and Desert Storm Atlas on October 28, 2026.

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