# MultiDeco vs Olypsys Measure

The clearest difference is price: Olypsys Measure at Free against MultiDeco's $48.99. Olypsys Measure also leads on review sentiment (67% vs 39%) and update cadence (every 4 weeks vs every 3 months). MultiDeco's advantage is rating (3.9 vs 3.0) and in-app purchases (none vs 3). On ratings volume, ads, device support and iOS requirement there is nothing between them.

Olypsys Measure is free to download; MultiDeco costs $48.99 up front. Olypsys Measure sells 3 in-app purchases, starting at $10.00 per month. MultiDeco asks for nothing beyond the download.

MultiDeco holds the better App Store score, 3.9 against 3.0. Both are backed by a comparable volume of ratings — 11 and 4 respectively. Written reviews complicate that: 39% of MultiDeco's written reviews are positive against 67% of Olypsys Measure's, so the app with the better star average is not the one people write more warmly about.

MultiDeco ships an update every 3 months, Olypsys Measure every 4 weeks. The most recent releases landed on September 19, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | MultiDeco | Olypsys Measure |
| --- | --- | --- |
| Price | $48.99 | **Free** |
| Rating | **[3.9 (11 ratings)](https://appshunter.io/ios/app/multideco/id781437836/reviews)** | [3.0 (4 ratings)](https://appshunter.io/ios/app/olypsys-measure/id1583943944/reviews) |
| Number of ratings | **11** | 4 |
| Positive reviews | 38.9% of reviews | **66.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 weeks** |
| Monetization | Paid | **Freemium** |
| Size | 2 MB | 101 MB |
| Requires iOS | 17.6 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [HHS Software Corp.](https://appshunter.io/developer/301978863) | [Olypsys Technologies Ltd](https://appshunter.io/developer/1583943946) |

## 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


### Olypsys Measure

[App page](https://appshunter.io/ios/app/olypsys-measure/id1583943944)

This app helps businesses accurately measure and identify O-rings using their phone. It matches measurements against international standards and maintains an audit record with project details. Ideal for quality control during goods-inward inspection, part replacement, and pre-assembly checks.

**Highlights:** Accurate O-ring measurement, O-ring identification, Match against international standards, Audit record keeping, Project reference and location tagging, Goods-inward inspection tool

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Olypsys Pro Monthly | $10.00 | per month |
| Pro (yearly) | $80.00 | per year |
| Olypsys Enterprise Yearly | $600.00 | per year |


## Frequently asked questions

### Is MultiDeco free?

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

### Is Olypsys Measure free?

Olypsys Measure is free to download, with in-app purchases available.

### Which has better reviews, MultiDeco or Olypsys Measure?

MultiDeco is rated higher. MultiDeco averages 3.9 out of 5 from 11 ratings, while Olypsys Measure averages 3.0 from 4 ratings.

### Do MultiDeco or Olypsys Measure have ads?

Neither MultiDeco nor Olypsys Measure shows ads.

### Which is updated more often, MultiDeco or Olypsys Measure?

MultiDeco ships an update every 3 months, and Olypsys Measure every 4 weeks. Most recently, MultiDeco was updated on September 19, 2026 and Olypsys Measure on September 17, 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.*