# Thread Calculator vs CERATIZIT

The clearest difference is rating: CERATIZIT at 5.0 against Thread Calculator's 4.3. CERATIZIT also leads on ads (none vs shown) and update cadence (every 2 months vs every 18 months). Thread Calculator's advantage is ratings volume (13 vs 1). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CERATIZIT holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Thread Calculator has 13 ratings behind it against 1, so its average is the more settled of the two.

Thread Calculator ships an update every 18 months, CERATIZIT every 2 months. The most recent releases landed on September 9, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Thread Calculator | CERATIZIT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (13 ratings)](https://appshunter.io/ios/app/thread-calculator/id1559560290/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ceratizit/id1661360258/reviews)** |
| Number of ratings | **13** | 1 |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 18 months | **Every 2 months** |
| Monetization | Ad-supported | **Free** |
| Size | 25 MB | 38 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [GSR Gustav Stursberg GmbH](https://appshunter.io/developer/1559560292) | [CERATIZIT Deutschland GmbH](https://appshunter.io/developer/1110341360) |

## What reviewers say

### 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


### CERATIZIT

[App page](https://appshunter.io/ios/app/ceratizit/id1661360258)

Access a cutting tools shop, utilize helpful daily work tools, and find industry knowledge and news. Features like a cutting data calculator and material classifications streamline your tasks.

**Highlights:** Cutting tools shop access, Daily work tools, Knowledge content, Latest news, Cutting data calculator, Material classifications, Lookup tools

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Thread Calculator free?

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

### Is CERATIZIT free?

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

### Which has better reviews, Thread Calculator or CERATIZIT?

CERATIZIT is rated higher. Thread Calculator averages 4.3 out of 5 from 13 ratings, while CERATIZIT averages 5.0 from 1 ratings.

### Do Thread Calculator or CERATIZIT have ads?

Thread Calculator shows ads; CERATIZIT does not.

### Which is updated more often, Thread Calculator or CERATIZIT?

Thread Calculator ships an update every 18 months, and CERATIZIT every 2 months. Most recently, Thread Calculator was updated on September 9, 2026 and CERATIZIT on September 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*