# Gas Blender Toolkit vs NASDS

The clearest difference is price: NASDS at Free against Gas Blender Toolkit's $2.99. NASDS also leads on iOS requirement (13.0 vs 15.0). Gas Blender Toolkit's advantage is update cadence (every 9 days vs monthly). On ads, in-app purchases and device support there is nothing between them.

NASDS 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, NASDS monthly. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Gas Blender Toolkit | NASDS |
| --- | --- | --- |
| 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** | Monthly |
| Monetization | Paid | — |
| Size | 3 MB | 42 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Oleg Gurevich](https://appshunter.io/developer/1467768489) | [Christian Daume](https://appshunter.io/developer/1681383719) |

## 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


### NASDS

[App page](https://appshunter.io/ios/app/nasds/id6447462158)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Gas Blender Toolkit free?

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

### Is NASDS free?

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

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

Neither Gas Blender Toolkit nor NASDS shows ads.

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

Gas Blender Toolkit ships an update every 9 days, and NASDS monthly. Most recently, Gas Blender Toolkit was updated on November 6, 2026 and NASDS on November 7, 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.*