Comparison

O vs Olypsys Measure

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

O

This app provides a comprehensive offline tool for selecting standard rubber seal sizes, including O-Rings, X-Rings, and Back-Up Rings. It offers dimension searches, housing calculations for various sealing applications, and supports multiple international standards in both metric and imperial units.

Highlights
  • Offline standard rubber seal size selection
  • Search for O-Ring, X-Ring, and Back-Up Ring sizes
  • O-Ring housing calculations for sealing applications
  • Supports multiple international standards (AS568, METRIC, JIS, etc.)
  • Metric and Imperial unit support
  • Substitutable O-Ring size suggestions
Features
Read full description

GMORS O-Ring Master is the completed tool for standard rubber seal sizes. When you use this APP, you don't need to have internet and catalog. Except O-Ring sizes, it also includes the search functions of X-Ring and Back-Up Ring. Otherwise, you can also use O-Ring Housing to choose suitable O-Ring in your application. Main functions are as follows: Dimension Search:O-Ring, X-Ring and Back-Up Ring. - MM and Inch are both available. - Full standard O-Ring series: AS568, BS 4518, GB/T 3452.1, JIS B2401 P, JIS B2401 G, JIS B2401 S, JIS B2401 V, SMS 1586 and METRIC. - Collocated Back-Up for AS-568 O-Ring. - Substitutable O-Ring sizes within tolerance are available. O-Ring Housing: Piston Sealing、Rod Sealing and Face Sealing. - MM and Inch are both available. - Support calculation for both Static and Dynamic sealing applications (Face sealing is with static calculation only). - Up to 7 O-Ring standards ( AS568, METRIC, JIS B2401 P/G/S/V, JASO F404, GB/T 3452.1, BS 4518 and SMS 1586) for most of size requirement of different groove design.

About

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.

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
Read full description

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

O4 screens
Olypsys Measure4 screens

Verdict

The call

The clearest difference is rating: O at 5.0 against Olypsys Measure's 3.0. O also leads on in-app purchases (none vs 3). Olypsys Measure's advantage is update cadence (every 4 weeks vs every 11 months) and ratings volume (4 vs 1). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Olypsys Measure sells 3 in-app purchases, starting at $10.00 per month. O asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

O holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 4 respectively.

UpkeepUpdate frequency

O ships an update every 11 months, Olypsys Measure every 4 weeks. The most recent releases landed on September 22, 2026 and September 17, 2026 respectively.

Scorecard5 real differences · 5 level
O versus Olypsys Measure: the parameters behind the verdict, then further details
ParameterOOlypsys Measure
PriceFreeFree
Rating5.0 (1 ratings) — better3.0 (4 ratings)
Positive reviews—66.7% of reviews
Number of ratings14 — better
Update frequencyEvery 11 monthsEvery 4 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhoneiPhone
Requires iOS16.0 — better16.4
Further details — not scored
Size47 MB101 MB
Age rating4+4+
DeveloperGE MAO RUBBER INDUSTRIAL CO., LTD.Olypsys Technologies Ltd

Customer experience

O

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Olypsys Measure

All ratings4 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

None

O

No in-app purchases

3 purchases

Olypsys Measure

Subscriptions3
  • Olypsys Pro Monthly3 Days trial$10.001 Month
  • Pro (yearly)$80.001 Year
  • Olypsys Enterprise Yearly$600.001 Year

Questions

Is O free?
O is free to download, with no in-app purchases.
Is Olypsys Measure free?
Olypsys Measure is free to download, with in-app purchases available.
Which has better reviews, O or Olypsys Measure?
O is rated higher. O averages 5.0 out of 5 from 1 ratings, while Olypsys Measure averages 3.0 from 4 ratings.
Do O or Olypsys Measure have ads?
Neither O nor Olypsys Measure shows ads.
Which is updated more often, O or Olypsys Measure?
O ships an update every 11 months, and Olypsys Measure every 4 weeks. Most recently, O was updated on September 22, 2026 and Olypsys Measure on September 17, 2026.

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