# Gas Blender Toolkit vs CCRtools

The clearest difference is price: CCRtools at Free against Gas Blender Toolkit's $2.99. Gas Blender Toolkit's advantage is iOS requirement (15.0 vs 18.2). On update cadence, ads, in-app purchases and device support there is nothing between them.

CCRtools is free to download; Gas Blender Toolkit costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Gas Blender Toolkit ships an update every 9 days, CCRtools fortnightly. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Gas Blender Toolkit | CCRtools |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/gas-blender-toolkit/id1467768490/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Fortnightly |
| Monetization | Paid | — |
| Size | 3 MB | 1 MB |
| Requires iOS | **15.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Oleg Gurevich](https://appshunter.io/developer/1467768489) | [Kai-Uwe Sattler](https://appshunter.io/developer/500229044) |

## What reviewers say

### Gas Blender Toolkit

[App page](https://appshunter.io/ios/app/gas-blender-toolkit/id1467768490)

This comprehensive toolkit assists scuba divers in calculating and blending various gas mixtures like trimix, nitrox, and heliox. It offers features for both partial pressure and continuous blending, cost calculation, and utilizes ideal and real gas models for accuracy. Optimized for larger screens, it serves as a successor to a previous diving application.

**Highlights:** Partial pressure blending, Continuous blending, Trimix, nitrox, heliox calculations, Ideal and real gas models, Cost calculation, Top off from storage

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

**In-app purchases:** none


### CCRtools

[App page](https://appshunter.io/ios/app/ccrtools/id6745844453)

**In-app purchases:** none


## Frequently asked questions

### Is Gas Blender Toolkit free?

Gas Blender Toolkit costs $2.99, with no in-app purchases.

### Is CCRtools free?

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

### Do Gas Blender Toolkit or CCRtools have ads?

Neither Gas Blender Toolkit nor CCRtools shows ads.

### Which is updated more often, Gas Blender Toolkit or CCRtools?

Gas Blender Toolkit ships an update every 9 days, and CCRtools fortnightly. Most recently, Gas Blender Toolkit was updated on October 29, 2026 and CCRtools 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.*