# Walter Feeds & Speeds vs O

The clearest difference is update cadence: O at every 6 weeks against Walter Feeds & Speeds's every 6 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.

Walter Feeds & Speeds ships an update every 6 months, O every 6 weeks. The most recent releases landed on November 1, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Walter Feeds & Speeds | O |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.2 (9 ratings)](https://appshunter.io/ios/app/walter-feeds-and-speeds/id454963587/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 6 weeks** |
| Monetization | Free | — |
| Size | 159 MB | 40 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Walter-AG](https://appshunter.io/developer/423564215) | [HUTCHINSON](https://appshunter.io/developer/862345826) |

## What reviewers say

### Walter Feeds & Speeds

[App page](https://appshunter.io/ios/app/walter-feeds-and-speeds/id454963587)

This app helps determine optimal feed rate and cutting speed values for various machining operations. It covers turning, drilling, threading, and milling with indexable inserts. Navigate through machining operations, materials, and tool types to find precise values.

**Highlights:** Determine feed rate and cutting speed, Supports turning, drilling, threading, milling, Indexable insert tool compatibility, Intuitive navigation, Workpiece material selection

**Features:** macOS Compatibility

**In-app purchases:** none


### O

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Walter Feeds & Speeds free?

Walter Feeds & Speeds is free to download, with no in-app purchases.

### Is O free?

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

### Do Walter Feeds & Speeds or O have ads?

Neither Walter Feeds & Speeds nor O shows ads.

### Which is updated more often, Walter Feeds & Speeds or O?

Walter Feeds & Speeds ships an update every 6 months, and O every 6 weeks. Most recently, Walter Feeds & Speeds was updated on November 1, 2026 and O on October 26, 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.*