Comparison

O vs iBlueTool

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

iBlueTool

Features
Read full description

iBlueTool is the APP that get temperature data through Bluetooth connections. Using the APP and connecting to Bluetooth to obtain data, look directly at the temperature curve and data. Remote monitoring and measurement can be achieved automatically save data. Note, this APP needs to be connected to a dedicated Bluetooth thermometer used together.

Screenshots

O4 screens
iBlueTool4 screens

Verdict

The call

The clearest difference is update cadence: iBlueTool at fortnightly against O's every 11 months. iBlueTool also leads on device support (3 vs 1) and iOS requirement (12.0 vs 16.0). On price, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

O ships an update every 11 months, iBlueTool fortnightly. The most recent releases landed on September 26, 2026 and October 6, 2026 respectively.

Scorecard3 real differences · 7 level
O versus iBlueTool: the parameters behind the verdict, then further details
ParameterOiBlueTool
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 11 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.012.0 — better
Further details — not scored
Size47 MB21 MB
Age rating4+4+
DeveloperGE MAO RUBBER INDUSTRIAL CO., LTD.Radiance Instruments Ltd

In-app purchases

None

O

No in-app purchases

None

iBlueTool

No in-app purchases

Questions

Is O free?
O is free to download, with no in-app purchases.
Is iBlueTool free?
iBlueTool is free to download, with no in-app purchases.
Do O or iBlueTool have ads?
Neither O nor iBlueTool shows ads.
Which is updated more often, O or iBlueTool?
O ships an update every 11 months, and iBlueTool fortnightly. Most recently, O was updated on September 26, 2026 and iBlueTool on October 6, 2026.

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