# Trimix Tools vs OVM

The clearest difference is update cadence: OVM at every 3 weeks against Trimix Tools's every 5 months. Trimix Tools's advantage is device support (4 vs 1) and price ($6.99 vs $7.99). On ads, in-app purchases and iOS requirement there is nothing between them.

Trimix Tools costs $6.99 and OVM $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Trimix Tools ships an update every 5 months, OVM every 3 weeks. The most recent releases landed on September 10, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Trimix Tools | OVM |
| --- | --- | --- |
| Price | **$6.99** | $7.99 |
| 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 3 weeks** |
| Monetization | Paid | — |
| Size | 6 MB | 1 MB |
| Requires iOS | **15.6** | 16.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Greg Mclaughlin](https://appshunter.io/developer/284919983) | [data-project bv](https://appshunter.io/developer/1896180478) |

## 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


### OVM

[App page](https://appshunter.io/ios/app/ovm/id6766059875)

**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 OVM free?

OVM costs $7.99, with no in-app purchases.

### Do Trimix Tools or OVM have ads?

Neither Trimix Tools nor OVM shows ads.

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

Trimix Tools ships an update every 5 months, and OVM every 3 weeks. Most recently, Trimix Tools was updated on September 10, 2026 and OVM on September 14, 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.*