# ThreadKing vs Thetis Tools

The clearest difference is update cadence: ThreadKing at every 6 days against Thetis Tools's every 7 months. ThreadKing also leads on iOS requirement (8.1 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.

ThreadKing ships an update every 6 days, Thetis Tools every 7 months. The most recent releases landed on September 22, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | ThreadKing | Thetis Tools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (12 ratings)](https://appshunter.io/ios/app/threadking/id1073753793/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 7 months |
| Monetization | Free | — |
| Size | 7 MB | 50 MB |
| Requires iOS | **8.1** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Motionics LLC](https://appshunter.io/developer/424498959) | [Thetis srl](https://appshunter.io/developer/397584184) |

## What reviewers say

### ThreadKing

[App page](https://appshunter.io/ios/app/threadking/id1073753793)

This app serves as a comprehensive reference and calculator for various thread types and dimensions. It provides detailed information on Metric and UN threads, including tap sizes and thread calculations for cutting and forming taps. Users can also find drill size charts and calculate RPM and feed rates for different materials.

**Highlights:** Metric and UN thread reference, Drill/Tap size charts, Pipe thread information, Cutting tap calculator, Forming tap calculator, RPM and feed rate calculator, Thread dimension details

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

**In-app purchases:** none


### Thetis Tools

[App page](https://appshunter.io/ios/app/thetis-tools/id1460268980)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ThreadKing free?

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

### Is Thetis Tools free?

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

### Do ThreadKing or Thetis Tools have ads?

Neither ThreadKing nor Thetis Tools shows ads.

### Which is updated more often, ThreadKing or Thetis Tools?

ThreadKing ships an update every 6 days, and Thetis Tools every 7 months. Most recently, ThreadKing was updated on September 22, 2026 and Thetis Tools on September 10, 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.*