# Trimix Tools vs Sym Junk

The clearest difference is price: Sym Junk at Free against Trimix Tools's $6.99. Sym Junk also leads on update cadence (every 3 days vs every 5 months). Trimix Tools's advantage is in-app purchases (none vs 1) and chart position (#119 vs unranked). On ads, device support and iOS requirement there is nothing between them.

Sym Junk is free to download; Trimix Tools costs $6.99 up front. Sym Junk sells 1 one-off in-app purchase. Trimix Tools asks for nothing beyond the download.

Trimix Tools ships an update every 5 months, Sym Junk every 3 days. Both last shipped on September 29, 2026.

## The numbers

| Metric | Trimix Tools | Sym Junk |
| --- | --- | --- |
| 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** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 days** |
| Monetization | Paid | — |
| Best chart rank | **#119** | — |
| Size | 6 MB | 59 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Greg Mclaughlin](https://appshunter.io/developer/284919983) | [Rogier Visser](https://appshunter.io/developer/672667764) |

## What reviewers say

### Trimix Tools

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

**Currently charting:** #119 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


### Sym Junk

[App page](https://appshunter.io/ios/app/sym-junk/id6794658823)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Divejunk | $6.99 | one-time |


## Frequently asked questions

### Is Trimix Tools free?

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

### Is Sym Junk free?

Sym Junk is free to download, with in-app purchases available.

### Do Trimix Tools or Sym Junk have ads?

Neither Trimix Tools nor Sym Junk shows ads.

### Which is updated more often, Trimix Tools or Sym Junk?

Trimix Tools ships an update every 5 months, and Sym Junk every 3 days. Most recently, Trimix Tools was updated on September 29, 2026 and Sym Junk on September 29, 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.*