# O vs igusGO

The clearest difference is review sentiment: igusGO at 100% against O's 83%. igusGO also leads on update cadence (monthly vs every 3 months). 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 ships an update every 3 months, igusGO monthly. The most recent releases landed on September 30, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | O | igusGO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (5 ratings)](https://appshunter.io/ios/app/o-ring/id485346224/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 83.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free | Free |
| Size | 26 MB | 98 MB |
| Requires iOS | 12.1 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Trelleborg Sealing Solutions](https://appshunter.io/developer/396863758) | [igus® GmbH](https://appshunter.io/developer/642706118) |

## 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


### igusGO

[App page](https://appshunter.io/ios/app/igusgo/id6457259315)

This app uses AI to analyze images of your existing applications and suggest suitable products for lubrication-free designs. It identifies optimization potential to improve technology and reduce costs, offering proven solutions and direct links to a shop for further details and purchases.

**Highlights:** Image-based product search, AI-driven analysis, Optimization potential identification, Solution-based suggestions, Direct link to shop, Time and cost savings

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is O free?

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

### Is igusGO free?

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

### Do O or igusGO have ads?

Neither O nor igusGO shows ads.

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

O ships an update every 3 months, and igusGO monthly. Most recently, O was updated on September 30, 2026 and igusGO on October 5, 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.*