# O vs OriginCheck

The clearest difference is rating: O at 3.8 against OriginCheck's 3.0. O also leads on update cadence (every 3 months vs every 10 months) and ratings volume (5 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

O holds the better App Store score, 3.8 against 3.0. That said, the two scores are not equally well evidenced: O has 5 ratings behind it against 1, so its average is the more settled of the two.

O ships an update every 3 months, OriginCheck every 10 months. The most recent releases landed on October 23, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | O | OriginCheck |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (5 ratings)](https://appshunter.io/ios/app/o-ring/id485346224/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/origincheck/id1224602380/reviews) |
| Number of ratings | **5** | 1 |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 10 months |
| Monetization | Free | Free |
| Size | 26 MB | 11 MB |
| Requires iOS | **12.1** | 13.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Trelleborg Sealing Solutions](https://appshunter.io/developer/396863758) | [Schaeffler](https://appshunter.io/developer/426470435) |

## What reviewers say

### O

[App page](https://appshunter.io/ios/app/o-ring/id485346224)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


### OriginCheck

[App page](https://appshunter.io/ios/app/origincheck/id1224602380)

Verify the authenticity of Schaeffler products and dealer certificates by scanning unique 2D codes. Receive immediate feedback on originality and get guided instructions for suspected counterfeiting, including direct contact with the brand protection team.

**Highlights:** Verify 2D product codes, Check dealer certificates, Report suspected counterfeiting, Find authorized sales partners, View scanned product details

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is O free?

O is free to download, with no in-app purchases.

### Is OriginCheck free?

OriginCheck is free to download, with no in-app purchases.

### Which has better reviews, O or OriginCheck?

O is rated higher. O averages 3.8 out of 5 from 5 ratings, while OriginCheck averages 3.0 from 1 ratings.

### Do O or OriginCheck have ads?

Neither O nor OriginCheck shows ads.

### Which is updated more often, O or OriginCheck?

O ships an update every 3 months, and OriginCheck every 10 months. Most recently, O was updated on October 23, 2026 and OriginCheck on October 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*