# CNC Machinist Calculator Pro vs ThreadKing

The clearest difference is price: ThreadKing at Free against CNC Machinist Calculator Pro's $14.99. ThreadKing also leads on update cadence (every 6 days vs every 2 months) and review sentiment (100% vs 84%). CNC Machinist Calculator Pro's advantage is ratings volume (680 vs 13) and chart position (#47 vs unranked). On rating, ads, in-app purchases and device support there is nothing between them.

ThreadKing is free to download; CNC Machinist Calculator Pro costs $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.7 for CNC Machinist Calculator Pro against 4.7 for ThreadKing. That said, the two scores are not equally well evidenced: CNC Machinist Calculator Pro has 680 ratings behind it against 13, so its average is the more settled of the two. Written reviews are what separate them: 84% of CNC Machinist Calculator Pro's written reviews are positive against 100% of ThreadKing's.

CNC Machinist Calculator Pro ships an update every 2 months, ThreadKing every 6 days. Both last shipped on October 29, 2026.

## The numbers

| Metric | CNC Machinist Calculator Pro | ThreadKing |
| --- | --- | --- |
| Price | $14.99 | **Free** |
| Rating | **[4.7 (680 ratings)](https://appshunter.io/ios/app/cnc-machinist-calculator-pro/id1037668281/reviews)** | [4.7 (13 ratings)](https://appshunter.io/ios/app/threadking/id1073753793/reviews) |
| Number of ratings | **680** | 13 |
| Positive reviews | 83.9% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 days** |
| Monetization | Paid | **Free** |
| Best chart rank | **#47** | — |
| Size | 47 MB | 7 MB |
| Requires iOS | 12.2 | **8.1** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | +4 |
| Developer | [Shane Anderson](https://appshunter.io/developer/1037668280) | [Motionics LLC](https://appshunter.io/developer/424498959) |

## What reviewers say

### CNC Machinist Calculator Pro

[App page](https://appshunter.io/ios/app/cnc-machinist-calculator-pro/id1037668281)

**Currently charting:** #47 Top Paid · Productivity (US App Store)

This app provides a comprehensive suite of calculators and tools for CNC machinists, engineers, and hobbyists. It offers specialized calculations for turning, milling, drilling, threading, and geometric tolerances, along with material data and G-code generation.

**Highlights:** Turning, Milling, and Drilling Calculators, Thread and Bolt Pattern Calculators, Geometric Tolerance (GD&T) Tools, Material Property and Weight Calculator, G-code Export for Chamfers and Tapers, Unit and Hardness Converters, Machinist Forum and Test

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Useful for thread data
- 👍 Helpful for programming mills and designing fixtures
- 👍 Provides all the technical data needed
- 👍 Great resource for learning as a beginner machinist
- 👍 Fantastic machinist reference and calculator

**What reviewers complain about**

- 🐛 No more support or new features
- 🐛 No easy reference chart for threads
- 🐛 Calculator issues with mathematical operations
- 🐛 Clunky UI and slow animations
- 🐛 Pauses music when opened

**Reported bugs**

- Bolt hole calculations incorrect
- Thermal expansion option not working properly
- Compatibility issues with newer iPhone models

**Requested features**

- Cylindrical grinding calculator
- Tool nose compensation for lathe
- Acme thread calculator
- G2/G3 configuration for milling
- Drill point length calculator


### 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


## Frequently asked questions

### Is CNC Machinist Calculator Pro free?

CNC Machinist Calculator Pro costs $14.99, with no in-app purchases.

### Is ThreadKing free?

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

### Which has better reviews, CNC Machinist Calculator Pro or ThreadKing?

CNC Machinist Calculator Pro is rated higher. CNC Machinist Calculator Pro averages 4.7 out of 5 from 680 ratings, while ThreadKing averages 4.7 from 13 ratings.

### Do CNC Machinist Calculator Pro or ThreadKing have ads?

Neither CNC Machinist Calculator Pro nor ThreadKing shows ads.

### Which is updated more often, CNC Machinist Calculator Pro or ThreadKing?

CNC Machinist Calculator Pro ships an update every 2 months, and ThreadKing every 6 days. Most recently, CNC Machinist Calculator Pro was updated on October 29, 2026 and ThreadKing on October 29, 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.*