# MultiDeco vs Arcus Trimix Blender

The clearest difference is price: Arcus Trimix Blender at Free against MultiDeco's $48.99. Arcus Trimix Blender also leads on update cadence (every 5 days vs every 3 months) and iOS requirement (15.0 vs 17.6). On ads, in-app purchases and device support there is nothing between them.

Arcus Trimix Blender is free to download; MultiDeco costs $48.99 up front. Neither carries in-app purchases, so what you see is what you pay.

MultiDeco ships an update every 3 months, Arcus Trimix Blender every 5 days. The most recent releases landed on September 19, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | MultiDeco | Arcus Trimix Blender |
| --- | --- | --- |
| Price | $48.99 | **Free** |
| Rating | **[3.9 (11 ratings)](https://appshunter.io/ios/app/multideco/id781437836/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 38.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 days** |
| Monetization | Paid | — |
| Size | 2 MB | 3 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [HHS Software Corp.](https://appshunter.io/developer/301978863) | [Kim Taavo](https://appshunter.io/developer/1738838892) |

## What reviewers say

### MultiDeco

[App page](https://appshunter.io/ios/app/multideco/id781437836)

This app calculates dive decompression for technical scuba divers using VPM and ZHL-16 models. It supports various gas mixes, planning methods for open circuit and rebreathers, and includes tools for gas blending and depth calculations.

**Highlights:** VPM and ZHL-16 decompression models, Support for nitrox and trimix, OC and CCR planning, Bailout planning, Gas blending utility, Depth calculation tools

**In-app purchases:** none


### Arcus Trimix Blender

[App page](https://appshunter.io/ios/app/arcus-trimix-blender/id6480379323)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is MultiDeco free?

MultiDeco costs $48.99, with no in-app purchases.

### Is Arcus Trimix Blender free?

Arcus Trimix Blender is free to download, with no in-app purchases.

### Do MultiDeco or Arcus Trimix Blender have ads?

Neither MultiDeco nor Arcus Trimix Blender shows ads.

### Which is updated more often, MultiDeco or Arcus Trimix Blender?

MultiDeco ships an update every 3 months, and Arcus Trimix Blender every 5 days. Most recently, MultiDeco was updated on September 19, 2026 and Arcus Trimix Blender on September 13, 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.*