# O vs Walter Insert Converter

The clearest difference is update cadence: O at every 6 weeks against Walter Insert Converter's every 23 months. O also leads on iOS requirement (12.0 vs 14.0). On price, ads, in-app purchases and device support 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 6 weeks, Walter Insert Converter every 23 months. The most recent releases landed on September 9, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | O | Walter Insert Converter |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 23 months |
| Monetization | — | Free |
| Size | 40 MB | 33 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HUTCHINSON](https://appshunter.io/developer/862345826) | [Walter-AG](https://appshunter.io/developer/423564215) |

## What reviewers say

### O

[App page](https://appshunter.io/ios/app/o-ring/id1229032846)

**Features:** macOS Compatibility

**In-app purchases:** none


### Walter Insert Converter

[App page](https://appshunter.io/ios/app/walter-insert-converter/id1261251907)

Easily find equivalent Walter inserts for your current machining tools. Optimize chip cutting, extend tool life, and enhance process safety and productivity.

**Highlights:** Find equivalent Walter inserts, Optimize chip cutting, Increase tool life, Enhance process safety, Supports ISO-Turning, parting-off, grooving, Covers advanced materials (CBN/PKD/Ceramics/Cermet)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is O free?

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

### Is Walter Insert Converter free?

Walter Insert Converter is free to download, with no in-app purchases.

### Do O or Walter Insert Converter have ads?

Neither O nor Walter Insert Converter shows ads.

### Which is updated more often, O or Walter Insert Converter?

O ships an update every 6 weeks, and Walter Insert Converter every 23 months. Most recently, O was updated on September 9, 2026 and Walter Insert Converter on June 1, 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.*