# Gas Blender vs TT SmartConfig

The clearest difference is in-app purchases: TT SmartConfig at none against Gas Blender's 3. TT SmartConfig also leads on update cadence (every 3 weeks vs every 2 months). Gas Blender's advantage is iOS requirement (15.1 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. Gas Blender sells 3 in-app purchases, starting at $0.49 per month. TT SmartConfig asks for nothing beyond the download.

Gas Blender ships an update every 2 months, TT SmartConfig every 3 weeks. The most recent releases landed on November 3, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Gas Blender | TT SmartConfig |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (6 ratings)](https://appshunter.io/ios/app/gas-blender/id1555767097/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 32 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Millennium Ltd](https://appshunter.io/developer/348691313) | [Typhon Technologies ApS](https://appshunter.io/developer/1680397002) |

## What reviewers say

### Gas Blender

[App page](https://appshunter.io/ios/app/gas-blender/id1555767097)

This app assists scuba divers in calculating and planning Nitrox and Trimix gas blends. It supports both imperial and metric units, offering calculations based on Ideal Gas and Van de Waals formulas. Users can also view the Maximum Operating Depths (MODs) for various factors and save planned mixes for future reference.

**Highlights:** Nitrox and Trimix gas blending, Imperial and metric unit support, Ideal Gas and Van de Waals formulas, MOD calculations (Narcosis, Density, O2 toxicity), Save planned gas mixes, User-selectable fill time

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.49 | per month |
| Annual | $2.99 | per year |
| Lifetime | $6.99 | one-time |


### TT SmartConfig

[App page](https://appshunter.io/ios/app/tt-smartconfig/id6464694178)

**In-app purchases:** none


## Frequently asked questions

### Is Gas Blender free?

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

### Is TT SmartConfig free?

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

### Do Gas Blender or TT SmartConfig have ads?

Neither Gas Blender nor TT SmartConfig shows ads.

### Which is updated more often, Gas Blender or TT SmartConfig?

Gas Blender ships an update every 2 months, and TT SmartConfig every 3 weeks. Most recently, Gas Blender was updated on November 3, 2026 and TT SmartConfig on October 25, 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.*