Comparison

O vs XQR Scan

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

XQR Scan

Features
Read full description

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

O4 screens
XQR Scan4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
O versus XQR Scan: the parameters behind the verdict, then further details
ParameterOXQR Scan
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 11 monthsEvery 10 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhoneiPhone, iPod — better
Requires iOS16.013.0 — better
Further details — not scored
Size47 MB25 MB
Age rating4+4+
DeveloperGE MAO RUBBER INDUSTRIAL CO., LTD.IINTERGO PTE. LTD.

In-app purchases

None

O

No in-app purchases

3 purchases

XQR Scan

Subscriptions3
  • Weekly Pro3 Days trial$4.997 Days
  • Weekly VIP3 Days trial$4.997 Days
  • Yearly VIP3 Days trial$49.991 Year

Questions

Is O free?
O is free to download, with no in-app purchases.
Is XQR Scan free?
XQR Scan is free to download, with in-app purchases available.
Do O or XQR Scan have ads?
XQR Scan shows ads; O does not.
Which is updated more often, O or XQR Scan?
O ships an update every 11 months, and XQR Scan every 10 days. Most recently, O was updated on September 26, 2026 and XQR Scan on October 2, 2026.

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