# Trimix Tools vs SPZ App

The clearest difference is price: SPZ App at Free against Trimix Tools's $6.99. SPZ App also leads on update cadence (every 2 months vs every 5 months) and iOS requirement (13.0 vs 15.6). On ads, in-app purchases and device support there is nothing between them.

SPZ App is free to download; Trimix Tools costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Trimix Tools ships an update every 5 months, SPZ App every 2 months. The most recent releases landed on October 14, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Trimix Tools | SPZ App |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/trimix-tools/id289220808/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 6 MB | 12 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Greg Mclaughlin](https://appshunter.io/developer/284919983) | [Andrej Flogie](https://appshunter.io/developer/1489962647) |

## What reviewers say

### Trimix Tools

[App page](https://appshunter.io/ios/app/trimix-tools/id289220808)

This app provides essential tools for divers to plan and blend Trimix gases. It calculates optimal mixes based on depth, oxygen partial pressure, and equivalent narcotic depth, and supports various cylinder filling scenarios. Calculations are available offline and can be customized with saved settings.

**Highlights:** Trimix blending and planning, Depth and partial pressure calculations, Equivalent Narcotic Depth (END) calculation, Saltwater and freshwater support, Cylinder filling and bleed down calculations, Metric and Imperial system support, Offline functionality, Saved settings and custom mixes

**Features:** Vision Pro support

**In-app purchases:** none


### SPZ App

[App page](https://appshunter.io/ios/app/spz-app/id6477761658)

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

**In-app purchases:** none


## Frequently asked questions

### Is Trimix Tools free?

Trimix Tools costs $6.99, with no in-app purchases.

### Is SPZ App free?

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

### Do Trimix Tools or SPZ App have ads?

Neither Trimix Tools nor SPZ App shows ads.

### Which is updated more often, Trimix Tools or SPZ App?

Trimix Tools ships an update every 5 months, and SPZ App every 2 months. Most recently, Trimix Tools was updated on October 14, 2026 and SPZ App on October 12, 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.*