# Gas Laws by CA vs WSU Tech

The clearest difference is price: WSU Tech at Free against Gas Laws by CA's $1.99. WSU Tech also leads on iOS requirement (15.0 vs 17.0). Gas Laws by CA's advantage is update cadence (every 2 months vs every 9 months). On ads, in-app purchases and device support there is nothing between them.

WSU Tech is free to download; Gas Laws by CA costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Gas Laws by CA ships an update every 2 months, WSU Tech every 9 months. The most recent releases landed on October 30, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Gas Laws by CA | WSU Tech |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/gas-laws-by-ca/id6587549604/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 9 months |
| Monetization | Paid | — |
| Size | 10 MB | 117 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Irving Josue Cortes Iturriaga](https://appshunter.io/developer/1750836580) | [Lecturio GmbH](https://appshunter.io/developer/667474928) |

## What reviewers say

### Gas Laws by CA

[App page](https://appshunter.io/ios/app/gas-laws-by-ca/id6587549604)

This app provides a quick and accurate way to solve gas law equations for engineers and students. It allows users to calculate any variable by entering known values and offers a glossary of gas constants.

**Highlights:** Solve Boyle's Law, Charles's Law, Gay-Lussac's Law, Avogadro's Law, Calculate Combined Gas Law and Ideal Gas Law, Solve Real Gas Equation, Enter known values to find unknown variables, Comprehensive glossary of gas constant R, Multilingual support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### WSU Tech

[App page](https://appshunter.io/ios/app/wsu-tech/id6756297314)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Gas Laws by CA free?

Gas Laws by CA costs $1.99, with no in-app purchases.

### Is WSU Tech free?

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

### Do Gas Laws by CA or WSU Tech have ads?

Neither Gas Laws by CA nor WSU Tech shows ads.

### Which is updated more often, Gas Laws by CA or WSU Tech?

Gas Laws by CA ships an update every 2 months, and WSU Tech every 9 months. Most recently, Gas Laws by CA was updated on October 30, 2026 and WSU Tech on November 4, 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.*