# Gas Blender Toolkit vs Decosoft

The clearest difference is price: Decosoft at Free against Gas Blender Toolkit's $2.99. Decosoft also leads on review sentiment (100% vs 60%). Gas Blender Toolkit's advantage is in-app purchases (none vs 8) and chart position (#161 vs unranked). On update cadence, ads, device support and iOS requirement there is nothing between them.

Decosoft is free to download; Gas Blender Toolkit costs $2.99 up front. Decosoft sells 8 in-app purchases, starting at $3.99 per month. Gas Blender Toolkit asks for nothing beyond the download.

Gas Blender Toolkit ships an update every 9 days, Decosoft every 2 weeks. The most recent releases landed on October 24, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Gas Blender Toolkit | Decosoft |
| --- | --- | --- |
| 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 | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 weeks |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | **#161** | — |
| Size | 3 MB | 47 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Oleg Gurevich](https://appshunter.io/developer/1467768489) | [Michael Czolko](https://appshunter.io/developer/674555865) |

## What reviewers say

### Gas Blender Toolkit

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

**Currently charting:** #161 Top Paid · Sports (US App Store)

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


### Decosoft

[App page](https://appshunter.io/ios/app/decosoft/id6453846218)

Plan your dives with this comprehensive tech diving tool. It offers a user-friendly interface, advanced decompression models, and various dive calculators to ensure safe and enjoyable underwater adventures. Save, share, and prepare for every dive with detailed insights.

**Highlights:** User-friendly dive planning interface, Bühlmann decompression model, Detailed runtime table with graphs, Support for OC and CCR, Multiple dive calculators, Save and share dive plans

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Partner | $3.99 | per month |
| Monthly | $3.99 | per month |
| Annual Partners | $39.99 | per year |
| Ultimate | $39.99 | per year |
| Ultimate Offer | $39.99 | per year |
| Ultimate | $20.99 | one-time |
| Ultimate | $23.99 | one-time |
| Ultimate | $29.99 | one-time |


## Frequently asked questions

### Is Gas Blender Toolkit free?

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

### Is Decosoft free?

Decosoft is free to download, with in-app purchases available.

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

Neither Gas Blender Toolkit nor Decosoft shows ads.

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

Gas Blender Toolkit ships an update every 9 days, and Decosoft every 2 weeks. Most recently, Gas Blender Toolkit was updated on October 24, 2026 and Decosoft on October 8, 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.*