O vs XQR Scan
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.
XQR Scan
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XQR Scan - the best QR reader & scanner. With its intuitive features, XQR Scan allows you to effortlessly scan and decode various types of QR codes and barcodes, displaying the results in an instant. Additionally, it empowers you to create your own QR codes, whether it's for website URLs, text messages, or even Wi-Fi credentials, enabling convenient sharing with friends through image-based formats. - Effortless QR Code and Barcode Recognition - Create Personalized QR Codes - Share with Ease - User-Friendly Interface - Secure and Privacy-Focused: Note: XQR Scan is designed for scanning and generating QR codes and barcodes. It is important to exercise caution when scanning codes from unknown or untrusted sources to ensure your safety and security. Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. For 24 hours before the end of subscription period from your account will be charged a payment for subscription renew and the cost of renewal is determined. You can manage own subscriptions. If you want to disable auto renew, you need go to Account Settings after subscription purchase. Any unused part of the trial period, if it exists, will be canceled after subscription purchase, where it's applicable. Terms: https://xqrscan.com/terms/ Privacy: https://xqrscan.com/privacy/ Support: support@xqrscan.com
Screenshots
Verdict
The clearest difference is in-app purchases: O at none against XQR Scan's 3. O also leads on ads (none vs shown). XQR Scan's advantage is update cadence (every 10 days vs every 11 months) and iOS requirement (13.0 vs 16.0). On price 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. XQR Scan sells 3 in-app purchases, starting at $4.99 per 7 days. O asks for nothing beyond the download.
O ships an update every 11 months, XQR Scan every 10 days. The most recent releases landed on September 26, 2026 and October 2, 2026 respectively.
| Parameter | O | XQR Scan |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 11 months | Every 10 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 16.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 47 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | GE MAO RUBBER INDUSTRIAL CO., LTD. | IINTERGO PTE. LTD. |
In-app purchases
O
No in-app purchases
XQR Scan
- Weekly Pro3 Days trial$4.997 Days
- Weekly VIP3 Days trial$4.997 Days
- Yearly VIP3 Days trial$49.991 Year









