# MultiDeco vs Surface Air Consumption

The clearest difference is review sentiment: Surface Air Consumption at 100% against MultiDeco's 39%. Surface Air Consumption also leads on price (Free vs $48.99) and rating (5.0 vs 3.9). MultiDeco's advantage is ratings volume (11 vs 2). On ads, in-app purchases and device support there is nothing between them.

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

Surface Air Consumption holds the better App Store score, 5.0 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 Surface Air Consumption's.

MultiDeco ships an update every 3 months, Surface Air Consumption weekly. The most recent releases landed on October 6, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | MultiDeco | Surface Air Consumption |
| --- | --- | --- |
| Price | $48.99 | **Free** |
| Rating | [3.9 (11 ratings)](https://appshunter.io/ios/app/multideco/id781437836/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/surface-air-consumption/id1532974489/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 | **Weekly** |
| Monetization | Paid | **Free** |
| Size | 2 MB | 1 MB |
| Requires iOS | 17.6 | **13.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [HHS Software Corp.](https://appshunter.io/developer/301978863) | [Leridian Dynamics, Inc.](https://appshunter.io/developer/1356342542) |

## 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


### Surface Air Consumption

[App page](https://appshunter.io/ios/app/surface-air-consumption/id1532974489)

This utility calculates surface air consumption (SAC) rates and air needs at depth using only user-provided dive profile data. It does not compute nitrogen absorption or decompression limits. Always prioritize safety and consult official decompression tables.

**Highlights:** Calculates SAC Rate, Estimates air requirements at depth, User input based calculations, Dive profile analysis, Focuses solely on air consumption

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is MultiDeco free?

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

### Is Surface Air Consumption free?

Surface Air Consumption is free to download, with no in-app purchases.

### Which has better reviews, MultiDeco or Surface Air Consumption?

Surface Air Consumption is rated higher. MultiDeco averages 3.9 out of 5 from 11 ratings, while Surface Air Consumption averages 5.0 from 2 ratings.

### Do MultiDeco or Surface Air Consumption have ads?

Neither MultiDeco nor Surface Air Consumption shows ads.

### Which is updated more often, MultiDeco or Surface Air Consumption?

MultiDeco ships an update every 3 months, and Surface Air Consumption weekly. Most recently, MultiDeco was updated on October 6, 2026 and Surface Air Consumption on October 16, 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.*