# MultiDeco vs Nitrox Blender & Calculator

The clearest difference is review sentiment: Nitrox Blender & Calculator at 100% against MultiDeco's 39%. Nitrox Blender & Calculator also leads on price ($0.99 vs $48.99) and rating (4.5 vs 3.9). MultiDeco's advantage is update cadence (every 3 months vs every 9 months) and ratings volume (11 vs 2). On ads, in-app purchases, monetization model and device support there is nothing between them.

MultiDeco costs $48.99 and Nitrox Blender & Calculator $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Nitrox Blender & Calculator holds the better App Store score, 4.5 against 3.9. That said, the two scores are not equally well evidenced: MultiDeco has 11 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 39% of MultiDeco's written reviews are positive against 100% of Nitrox Blender & Calculator's.

MultiDeco ships an update every 3 months, Nitrox Blender & Calculator every 9 months. The most recent releases landed on September 19, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | MultiDeco | Nitrox Blender & Calculator |
| --- | --- | --- |
| Price | $48.99 | **$0.99** |
| Rating | [3.9 (11 ratings)](https://appshunter.io/ios/app/multideco/id781437836/reviews) | **[4.5 (2 ratings)](https://appshunter.io/ios/app/nitrox-blender-and-calculator/id986513867/reviews)** |
| Number of ratings | **11** | 2 |
| Positive reviews | 38.9% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 9 months |
| Monetization | Paid | Paid |
| Size | 2 MB | 85 MB |
| Requires iOS | 17.6 | **10.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [HHS Software Corp.](https://appshunter.io/developer/301978863) | [ComputerWare](https://appshunter.io/developer/475216885) |

## 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


### Nitrox Blender & Calculator

[App page](https://appshunter.io/ios/app/nitrox-blender-and-calculator/id986513867)

This app helps divers plan their dives by calculating maximum operating depth, optimal oxygen percentage, and equivalent air depth. It also assists in gas mixing for filling tanks, determining the required mix or the resulting blend.

**Highlights:** Calculate MOD, Calculate optimal oxygen percentage, Calculate equivalent air depth, Gas mixing calculations for tank fills, Determine required mix for desired blend, Calculate resulting mix from existing blend

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

**In-app purchases:** none


## Frequently asked questions

### Is MultiDeco free?

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

### Is Nitrox Blender & Calculator free?

Nitrox Blender & Calculator costs $0.99, with no in-app purchases.

### Which has better reviews, MultiDeco or Nitrox Blender & Calculator?

Nitrox Blender & Calculator is rated higher. MultiDeco averages 3.9 out of 5 from 11 ratings, while Nitrox Blender & Calculator averages 4.5 from 2 ratings.

### Do MultiDeco or Nitrox Blender & Calculator have ads?

Neither MultiDeco nor Nitrox Blender & Calculator shows ads.

### Which is updated more often, MultiDeco or Nitrox Blender & Calculator?

MultiDeco ships an update every 3 months, and Nitrox Blender & Calculator every 9 months. Most recently, MultiDeco was updated on September 19, 2026 and Nitrox Blender & Calculator on September 24, 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.*