# Walter Wear Optimization vs Thread Calculator

The clearest difference is ads: Walter Wear Optimization at none against Thread Calculator's shown. Walter Wear Optimization also leads on iOS requirement (13.0 vs 15.0). Thread Calculator's advantage is update cadence (every 18 months vs every 60 months). On price, 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 Wear Optimization ships an update every 60 months, Thread Calculator every 18 months. The most recent releases landed on September 7, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Walter Wear Optimization | Thread Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (13 ratings)](https://appshunter.io/ios/app/thread-calculator/id1559560290/reviews)** |
| Number of ratings | — | **13** |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 60 months | **Every 18 months** |
| Monetization | — | Ad-supported |
| Size | 60 MB | 25 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Walter-AG](https://appshunter.io/developer/423564215) | [GSR Gustav Stursberg GmbH](https://appshunter.io/developer/1559560292) |

## What reviewers say

### Walter Wear Optimization

[App page](https://appshunter.io/ios/app/walter-wear-optimization/id1069887603)

**Features:** macOS Compatibility

**In-app purchases:** none


### Thread Calculator

[App page](https://appshunter.io/ios/app/thread-calculator/id1559560290)

This app provides a quick and easy way to calculate thread dimensions for various units, including tap hole sizes and bolt specifications. It helps metalworkers find precise measurements for internal and external threads without consulting tables.

**Highlights:** Thread cutting calculator for multiple units, Cold forming calculator, Thread repair calculator, Tap hole and bolt diameter calculation, Saves time compared to tables

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Walter Wear Optimization free?

Walter Wear Optimization is free to download, with no in-app purchases.

### Is Thread Calculator free?

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

### Do Walter Wear Optimization or Thread Calculator have ads?

Thread Calculator shows ads; Walter Wear Optimization does not.

### Which is updated more often, Walter Wear Optimization or Thread Calculator?

Walter Wear Optimization ships an update every 60 months, and Thread Calculator every 18 months. Most recently, Walter Wear Optimization was updated on September 7, 2026 and Thread Calculator on September 9, 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.*