O vs 理业
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
理业
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您好： Who is the target audience？ 我们的用户是丽水逆熵科技有限公司的所服务的用户，平台后台地址http://www.nstplatform.com， How do users obtain an account? 登录app的账号是和密码是登入平台的账号，新的子账号可以在左侧栏目“系统管理-账号管理”中进行创建，或者通过注册来产生账号 Is this app meant for internal distribution in your own company, in the company of one target client, or in multiple target clients’ companies? 理业app可以对自己的公司或者是合作方的公司支持使用 In which countries will this app primarily be distributed? 目前app只是在中国境内发布使用 If this app is meant for internal distribution, will the app be accessible by both internal and external partners? Or will it be exclusive to in-house employees? 只要是和我们公司有合作的公司，并通过公司注册的账号都可以使用该app
Screenshots
Verdict
The clearest difference is iOS requirement: 理业 at 11.0 against O's 16.0. On price, rating, ratings volume and update cadence 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.
On the App Store both sit at effectively the same score — 5.0 for O against 5.0 for 理业. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
O ships an update every 11 months, 理业 every 12 months. The most recent releases landed on September 26, 2026 and September 8, 2026 respectively.
| Parameter | O | 理业 |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 | 1 |
| Update frequency | Every 11 months — better | Every 12 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 16.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 47 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | GE MAO RUBBER INDUSTRIAL CO., LTD. | Lishui Inverse Enzyme Technology Co., Ltd. |
Customer experience
O
理业
In-app purchases
O
No in-app purchases
理业
No in-app purchases
