# Eclipse O vs B

The clearest difference is update cadence: B at every 2 weeks against Eclipse O's every 6 months. B also leads on rating (5.0 vs 4.7). Eclipse O's advantage is ratings volume (11 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.

B holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Eclipse O has 11 ratings behind it against 1, so its average is the more settled of the two.

Eclipse O ships an update every 6 months, B every 2 weeks. The most recent releases landed on September 23, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Eclipse O | B |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (11 ratings)](https://appshunter.io/ios/app/eclipse-o-ring-finder/id1491496693/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/b-urn/id6744317621/reviews)** |
| Number of ratings | **11** | 1 |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 308 MB | 65 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Planet Eclipse Ltd](https://appshunter.io/developer/1491488435) | [Codefish SAL](https://appshunter.io/developer/1106508165) |

## What reviewers say

### Eclipse O

[App page](https://appshunter.io/ios/app/eclipse-o-ring-finder/id1491496693)

Easily identify the correct o-rings for your Eclipse paintball markers. This application provides a quick reference to ensure you have the right parts for maintenance and repairs.

**Highlights:** O-ring identification for Eclipse markers, Quick reference tool, Maintenance and repair assistance, Specific to Eclipse paintball products

**Features:** Vision Pro support

**In-app purchases:** none


### B

[App page](https://appshunter.io/ios/app/b-urn/id6744317621)

Easily find and book fitness classes at various locations. Manage your bookings, including topping up credits and canceling sessions, all within a streamlined interface.

**Highlights:** View classes across all locations, Book fitness sessions, Top up class credits, Cancel existing bookings, Streamlined booking management

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

**In-app purchases:** none


## Frequently asked questions

### Is Eclipse O free?

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

### Is B free?

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

### Which has better reviews, Eclipse O or B?

B is rated higher. Eclipse O averages 4.7 out of 5 from 11 ratings, while B averages 5.0 from 1 ratings.

### Do Eclipse O or B have ads?

Neither Eclipse O nor B shows ads.

### Which is updated more often, Eclipse O or B?

Eclipse O ships an update every 6 months, and B every 2 weeks. Most recently, Eclipse O was updated on September 23, 2026 and B on September 25, 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.*