O vs LIVENESS Rooms
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 suitable O-ring sizes based on installation specifications. It supports metric and inch measurements and offers chemical compatibility checks for various media.
- O-Ring housing calculation
- O-Ring size recommendation
- Quick search by international standards
- Tolerance calculation
- Metric and inch unit switching
- Chemical compatibility check
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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
LIVENESS Rooms
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LIVENESS Rooms の iPad ネイティブアプリケーションです。 Safari版LIVENESS Roomsの機能に加え、以下の機能を使用することが出来ます。 ・時間指定によるアプリの使用／非使用が可能です。サーバー非稼働時に任意のメッセージを表示することが出来ます。
Screenshots
Verdict
The clearest difference is update cadence: LIVENESS Rooms at every 3 weeks against O's every 3 months. LIVENESS Rooms also leads on iOS requirement (10.0 vs 26.0). On price, ads, in-app purchases and device support 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, LIVENESS Rooms every 3 weeks. Both last shipped on November 2, 2026.
| Parameter | O | LIVENESS Rooms |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (5 ratings) — better | — |
| Positive reviews | 83.3% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 3 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad — better | iPad |
| Requires iOS | 26.0 | 10.0 — better |
| Further details — not scored | ||
| Size | 35 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Trelleborg Sealing Solutions | liveness,Inc. |
In-app purchases
O
No in-app purchases
LIVENESS Rooms
No in-app purchases
