# Walter Insert Converter vs Thread Calculator

The clearest difference is ads: Walter Insert Converter at none against Thread Calculator's shown. Walter Insert Converter also leads on monetization model (free vs ad-supported). Thread Calculator's advantage is review sentiment (33% vs 0%). On price, update cadence, 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 Insert Converter ships an update every 23 months, Thread Calculator every 18 months. The most recent releases landed on October 7, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Walter Insert Converter | 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 | 0.0% of reviews | **33.3% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 23 months | **Every 18 months** |
| Monetization | **Free** | Ad-supported |
| Size | 33 MB | 25 MB |
| Requires iOS | **14.0** | 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 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


### 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 Insert Converter free?

Walter Insert Converter 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 Insert Converter or Thread Calculator have ads?

Thread Calculator shows ads; Walter Insert Converter does not.

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

Walter Insert Converter ships an update every 23 months, and Thread Calculator every 18 months. Most recently, Walter Insert Converter was updated on October 7, 2026 and Thread Calculator on September 27, 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.*