# Trimix Tools vs nitroxCalc

The clearest difference is price: nitroxCalc at Free against Trimix Tools's $6.99. nitroxCalc also leads on iOS requirement (9.0 vs 15.6). Trimix Tools's advantage is update cadence (every 5 months vs every 18 months) and chart position (#31 vs unranked). On ads and in-app purchases there is nothing between them.

nitroxCalc 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, nitroxCalc every 18 months. The most recent releases landed on September 10, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Trimix Tools | nitroxCalc |
| --- | --- | --- |
| 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 18 months |
| Monetization | Paid | — |
| Best chart rank | **#31** | — |
| Size | 6 MB | 5 MB |
| Requires iOS | 15.6 | **9.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Greg Mclaughlin](https://appshunter.io/developer/284919983) | [CAP-REL](https://appshunter.io/developer/1405536766) |

## What reviewers say

### Trimix Tools

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

**Currently charting:** #31 Top Paid · Sports (US App Store)

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


### nitroxCalc

[App page](https://appshunter.io/ios/app/nitroxcalc/id1408060704)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Trimix Tools free?

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

### Is nitroxCalc free?

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

### Do Trimix Tools or nitroxCalc have ads?

Neither Trimix Tools nor nitroxCalc shows ads.

### Which is updated more often, Trimix Tools or nitroxCalc?

Trimix Tools ships an update every 5 months, and nitroxCalc every 18 months. Most recently, Trimix Tools was updated on September 10, 2026 and nitroxCalc on September 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*