# O vs ECCOFLOAT®

The clearest difference is update cadence: ECCOFLOAT® at every 5 months against O's every 11 months. ECCOFLOAT® also leads on iOS requirement (12.0 vs 16.0). On price, rating, ratings volume and ads there is nothing between them.

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 ECCOFLOAT®. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

O ships an update every 11 months, ECCOFLOAT® every 5 months. The most recent releases landed on September 26, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | O | ECCOFLOAT® |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/o-ring-master/id1072051820/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/eccofloat/id1349682192/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 5 months** |
| Monetization | Free | Free |
| Size | 47 MB | 61 MB |
| Requires iOS | 16.0 | **12.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [GE MAO RUBBER INDUSTRIAL CO., LTD.](https://appshunter.io/developer/1078558543) | [Trelleborg AB](https://appshunter.io/developer/423282462) |

## What reviewers say

### O

[App page](https://appshunter.io/ios/app/o-ring-master/id1072051820)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### ECCOFLOAT®

[App page](https://appshunter.io/ios/app/eccofloat/id1349682192)

Explore deep sea buoyancy applications with this app. Scan parts for traceability, calculate uplift and volume using a buoyancy calculator, and view product capabilities for custom molded shapes and block forms.

**Highlights:** NFC and QR code scanning, Full part traceability, Buoyancy Calculator, Uplift and volume calculation, View product capabilities, Custom molded shapes information

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is O free?

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

### Is ECCOFLOAT® free?

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

### Which has better reviews, O or ECCOFLOAT®?

O and ECCOFLOAT® are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do O or ECCOFLOAT® have ads?

Neither O nor ECCOFLOAT® shows ads.

### Which is updated more often, O or ECCOFLOAT®?

O ships an update every 11 months, and ECCOFLOAT® every 5 months. Most recently, O was updated on September 26, 2026 and ECCOFLOAT® on October 8, 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.*