MultiDeco vs Olypsys Measure
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MultiDeco
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.
- VPM and ZHL-16 decompression models
- Support for nitrox and trimix
- OC and CCR planning
- Bailout planning
- Gas blending utility
- Depth calculation tools
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A dive decompression calculator for technical scuba divers. MultiDeco presents the VPM and ZHL-16 decompression model and includes VPM-B, VPM-B/E, ZHL model versions and ZHL-16 + GF. The diver can specify any combination of nitrox or trimix, and as many deco gases as required. Planning methods include both OC and Closed Circuit Rebreather. It includes planning for bailouts with SCR and OC legs in a CCR plan. Includes details of ppO2, END, and gas consumptions. This program includes many of the features from the desktop version such as conservatism adjustments, extended stops, adjustable last stops, the planning monitor system and extensive control over many other planning features. Also included is a set of dive planning tools for calculating best mix, maximum operating depth (MOD), END, EAD and other planning considerations. The Mixer utility for blending nitrox and trimix, is included too.
Olypsys Measure
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.
- Accurate O-ring measurement
- O-ring identification
- Match against international standards
- Audit record keeping
- Project reference and location tagging
- Goods-inward inspection tool
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Measure and identify O-rings, gaskets, circlips and washers with your phone. Put the part flat on an Olypsys calibration grid and take a photo. You get its dimensions in seconds, and the app tells you which catalogue parts fit. WHAT IT MEASURES Free: O-rings and backup rings. Pro: worn and compression-set O-rings, FEP O-rings, X-rings, square rings, V-rings, O-ring cord, gaskets, circlips and washers. Enterprise: enhanced-accuracy O-ring measurement and remote capture. STANDARDS MATCHING Measured parts are compared against catalogue sizes from standards including AS568, BS 4518, GB/T 3452.1, JIS B 2401, DIN 471, DIN 472, DIN 6799, ASME B16.21 and EN 1514-1. You see ranked candidates with a confidence score, part number and manufacturer. CAD EXPORT (PRO) Download any traced gasket, circlip or washer as DXF, SVG or .o2d for cutting or quoting. WHAT PEOPLE USE IT FOR Goods-inward inspection. Identifying worn or unmarked parts for replacement. Quality checks before assembly. Go/No-go checking against your own tolerances or a standard size. Measurements save with a project reference, location and application. Free accounts keep three days of history. Pro keeps all of it. The computer vision corrects for shadows, camera tilt and lens distortion, so results repeat between photos. You need an Olypsys calibration grid. Print one, or buy a durable mat. Pro and Enterprise are subscriptions. Enterprise is sold through Olypsys and its distributors: contact sales@olypsys.com.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | MultiDeco | Olypsys Measure |
|---|---|---|
| Price | $48.99 | Free — better |
| Rating | 3.9 (11 ratings) — better | 3.0 (4 ratings) |
| Positive reviews | 38.9% of reviews | 66.7% of reviews — better |
| Number of ratings | 11 — better | 4 |
| Update frequency | Every 3 months | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Freemium — better |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.6 | 16.4 — better |
| Further details — not scored | ||
| Size | 2 MB | 101 MB |
| Age rating | 4+ | 4+ |
| Developer | HHS Software Corp. | Olypsys Technologies Ltd |
Customer experience
MultiDeco
Olypsys Measure
In-app purchases
MultiDeco
No in-app purchases
Olypsys Measure
- Olypsys Pro Monthly3 Days trial$10.001 Month
- Pro (yearly)$80.001 Year
- Olypsys Enterprise Yearly$600.001 Year
Questions
Is MultiDeco free?
Is Olypsys Measure free?
Which has better reviews, MultiDeco or Olypsys Measure?
Do MultiDeco or Olypsys Measure have ads?
Which is updated more often, MultiDeco or Olypsys Measure?
Other comparisons
