# O-Ring

> O-Ring (iPhone/iPad app by HUTCHINSON.)

- Source: https://appshunter.io/ios/app/o-ring/id1229032846 (this page in markdown: same URL + `.md`)
- Developer: [HUTCHINSON](https://appshunter.io/developer/862345826)
- Category: Productivity, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 12.0 · 40 MB
- Languages: American English, Czech, Danish, Dutch, Finnish, French (France), German (Germany), Greek, Hebrew, Indonesian and 15 more
- Released: 2017-10-17
- Data updated: 2026-05-17
- User reviews in markdown: https://appshunter.io/ios/app/o-ring/id1229032846/reviews.md

## What is O?

Who hasn't sometimes wished for assistance when it comes to define the mounting dimensions for O-Rings or even find the right O-Ring?
The Hutchinson O-Ring app offers precious tools: 

• Assembly aid, depending on the installation type (in a bore, on a piston, cover fitting with internal or external pressure)
• Compounds compatibility with various fluids
• Intelligent O-Ring measuring tool with the smartphone's camera function
• Dimensions list for standard parts
You can choose a reference number from thousands of available O-Rings and then precisely define the groove dimensions to ensure perfect sealing.

On the contrary, after choosing the installation type and the groove dimensions, the app will recommend a list of compatible O-Ring dimensions.

A smart measuring tool has been developed to measure your O-Rings dimensions. This can for instance be used in MRO for easy replacement. Take a coin to set the standard and watch your smartphone turn into a digital measure tool for precision seals!

If chemistry classes are bad memories for you, the compound compatibility tool will help you to define the appropriate compound family, depending on the fluid used in your application.

Bonus : get the PDF calculation results per email !

In order to confirm your choice, we recommend to validate with tests


## Version history (last 5 releases)

### 2.9.0 — 2024-09-25

New stats provider

### 2.8.0 — 2021-10-12

GDRP compliance update.

### 2.7.0 — 2020-04-17

Layout size correction

### 2.6.0 — 2020-04-17

Minor text view correction.

### 2.2 — 2017-12-09

Screenshots update

## Apps similar to O

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Walter Insert Converter](https://appshunter.io/ios/app/walter-insert-converter/id1261251907) | — | Free | Productivity |
| [Racing Aspirations](https://appshunter.io/ios/app/racing-aspirations/id1076512172) | 2.3 (3) | Free | Productivity |
| [Walter Feeds & Speeds](https://appshunter.io/ios/app/walter-feeds-and-speeds/id454963587) | 2.4 (8) | Free | Productivity |
| [GameSmart](https://appshunter.io/ios/app/gamesmart/id1552041700) | — | Free | Productivity |
| [Hydraulic schemes](https://appshunter.io/ios/app/hydraulic-schemes/id1602894931) | — | $0.99 | Productivity |
| [Inspector - SIRE 2.0 Prep](https://appshunter.io/ios/app/inspector-sire-20-prep/id6748201188) | — | Free | Productivity |

## More apps by HUTCHINSON

- [Conveyxonic Wizard ®](https://appshunter.io/ios/app/conveyxonic-wizard/id862345823)
- [Smart Belt Drive](https://appshunter.io/ios/app/smart-belt-drive/id1093873727)
- [Poly V Design](https://appshunter.io/ios/app/poly-v-design/id1153521116)
- [PaulstraSoft](https://appshunter.io/ios/app/paulstrasoft/id1242874951)
- [O-Ring Info](https://appshunter.io/ios/app/o-ring-info/id1369062925)

All apps by HUTCHINSON: https://appshunter.io/developer/862345826

## Related topics

[ultrahuman ring air](https://appshunter.io/ios/topics/ultrahuman-ring-air)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-17.*