# Walter Machining Calculator vs OmniCalc

The clearest difference is in-app purchases: Walter Machining Calculator at none against OmniCalc's 1. Walter Machining Calculator also leads on ads (none vs shown) and iOS requirement (18.0 vs 26.2). OmniCalc's advantage is update cadence (every 11 days vs every 19 months). On price and device support there is nothing between them.

Both are free to download. OmniCalc sells 1 one-off in-app purchase. Walter Machining Calculator asks for nothing beyond the download.

Walter Machining Calculator ships an update every 19 months, OmniCalc every 11 days. The most recent releases landed on October 23, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Walter Machining Calculator | OmniCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (5 ratings)](https://appshunter.io/ios/app/walter-machining-calculator/id423564212/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 62.9% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 19 months | **Every 11 days** |
| Monetization | Free | — |
| Size | 95 MB | 5 MB |
| Requires iOS | **18.0** | 26.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Walter-AG](https://appshunter.io/developer/423564215) | [KODA SHUJI](https://appshunter.io/developer/1873008358) |

## What reviewers say

### Walter Machining Calculator

[App page](https://appshunter.io/ios/app/walter-machining-calculator/id423564212)

Calculate machining time, power, torque, and cutting force for various operations. Compare existing tools with new ones to project potential savings.

**Highlights:** Calculate machining time, power, and torque, Determine cutting force and metal removal rate, Support for milling, drilling, boring, turning, and grooving, Thread tapping, forming, and milling calculations, Material selection for calculations, Savings calculator for tool comparison

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### OmniCalc

[App page](https://appshunter.io/ios/app/omnicalc/id6758456828)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Upgrade | $4.99 | one-time |


## Frequently asked questions

### Is Walter Machining Calculator free?

Walter Machining Calculator is free to download, with no in-app purchases.

### Is OmniCalc free?

OmniCalc is free to download, with in-app purchases available.

### Do Walter Machining Calculator or OmniCalc have ads?

OmniCalc shows ads; Walter Machining Calculator does not.

### Which is updated more often, Walter Machining Calculator or OmniCalc?

Walter Machining Calculator ships an update every 19 months, and OmniCalc every 11 days. Most recently, Walter Machining Calculator was updated on October 23, 2026 and OmniCalc on October 17, 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.*