O vs Pneumatics
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
O
This app helps users calculate O-Ring dimensions and find compatible materials for their applications. It provides recommendations based on ISO standards and supports both metric and inch measurements.
- O-Ring housing calculation
- O-Ring size recommendations by ISO standard
- Quick search by national/international standards
- O-Ring tolerance calculation
- Metric and inch unit switching
- Chemical compatibility check
- Integration of Trelleborg Sealing Solutions Videos
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The Trelleborg Sealing Solutions O-Ring App calculates O-Ring dimensions by simply entering installation specifications for your application in metric or inch. In addition, the App recommends O-Ring sizes according to ISO 3601 so you know exactly which part you need. Features at a Glance: - O-Ring Housing: After entering the bore or rod/shaft diameter, you will receive an O-Ring recommendation and O-Ring housing calculation according to the recommendations of ISO 3601 - O-Ring Quick Search: offers the selection of O-Ring nominal sizes according to the following national/international standards: ISO 3601-1 Class B (International), ISO 3601-1 Class A (AS 568, USA), NFT 47-502 (France), JIS B 2401 (Japan) SMS 1586 (Sweden) - Tolerances: calculation of O-Ring tolerances according to ISO 3601-1 Class B and Class A - Switch between metric and inch - Chemical compatibility check: find out which materials are compatible with the media used in your application. - Integration of Trelleborg Sealing Solutions Videos
Pneumatics
This app offers essential calculation tools for pneumatic systems, aiding in automation system design and equipment selection. It helps users determine cylinder force, speed, air consumption, and estimate costs, streamlining work with pneumatic components.
- Cylinder force calculation
- Force requirement estimation
- Cylinder speed calculation
- Air consumption calculation
- Shock absorber analysis
- Pressure and flow rate conversion
- Hose diameter and piston rod diameter definition
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Pneumatic Cylinder calculation tools provide for automation system calculation and define for how to right choose equipment and reduce time for working with pneumatic systems. Such as; - Cylinder force - Force require - Cylinder speed - Cylinder air consumption - Shock absorber - Pressure converter - Hose Diameter - Pneumatic Cylinder Symbol - Piston rod diameter define - Maximum stroke length - Air leak cost estimate - Flow rate converter
Screenshots
Verdict
The clearest difference is review sentiment: O at 83% against Pneumatics's 0%. O also leads on iOS requirement (12.1 vs 17.0). Pneumatics's advantage is update cadence (monthly vs every 3 months). On price, ads, in-app purchases and monetization model 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
O ships an update every 3 months, Pneumatics monthly. The most recent releases landed on September 30, 2026 and October 2, 2026 respectively.
| Parameter | O | Pneumatics |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (5 ratings) — better | — |
| Positive reviews | 83.3% of reviews — better | 0.0% of reviews |
| Number of ratings | 5 — better | — |
| Update frequency | Every 3 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 26 MB | 4 MB |
| Age rating | 12+ | 4+ |
| Developer | Trelleborg Sealing Solutions | Amnaj Sriwilai |
Customer experience
O
Pneumatics
In-app purchases
O
No in-app purchases
Pneumatics
No in-app purchases
