# Optimising vs CNC Machinist Calculator

The clearest difference is rating: CNC Machinist Calculator at 5.0 against Optimising's 2.8. CNC Machinist Calculator also leads on update cadence (every 2 months vs every 8 months). Optimising's advantage is in-app purchases (none vs 3) and ratings volume (4 vs 1). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. CNC Machinist Calculator sells 3 in-app purchases, starting at $0.99 per month. Optimising asks for nothing beyond the download.

CNC Machinist Calculator holds the better App Store score, 5.0 against 2.8. Both are backed by a comparable volume of ratings — 4 and 1 respectively. Written reviews point the same way: 63% of Optimising's written reviews are positive against 67% of CNC Machinist Calculator's.

Optimising ships an update every 8 months, CNC Machinist Calculator every 2 months. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Optimising | CNC Machinist Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.8 (4 ratings)](https://appshunter.io/ios/app/optimising/id868624456/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cnc-machinist-calculator/id6605942020/reviews)** |
| Number of ratings | **4** | 1 |
| Positive reviews | 62.5% of reviews | **66.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 8 MB | 8 MB |
| Requires iOS | **9.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Guhring Pty. Ltd.](https://appshunter.io/developer/868624459) | [Vladislav Zhirnov](https://appshunter.io/developer/1476188065) |

## What reviewers say

### Optimising

[App page](https://appshunter.io/ios/app/optimising/id868624456)

This utility helps optimize the performance of rotary cutting tools like drills, taps, milling cutters, and reamers. It provides assistance to enhance the efficiency of these tools in various applications.

**Highlights:** Optimize rotary cutting tool performance, Assists with drills, taps, milling cutters, reamers, Enhances tool efficiency

**Features:** macOS Compatibility

**In-app purchases:** none


### CNC Machinist Calculator

[App page](https://appshunter.io/ios/app/cnc-machinist-calculator/id6605942020)

This industrial calculator provides CNC programmers and machinists with instant calculations for speeds, feeds, horsepower, coolant flow, tolerances, and G-code patterns. It offers 16 production-ready tools, works offline, and features a user-friendly interface designed for the shop floor. Save and share results for improved efficiency and accuracy.

**Highlights:** Milling Speed & Feed Calculator, Drilling Speed & Feed Calculator, Tolerance & Fit Calculator, G-Code Reference & Generators, Chip Load & Tool Deflection Calculator, Offline functionality, Inch/Metric unit switching

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ADS monthly | $0.99 | per month |
| Full version / year | $2.99 | per year |
| Remove ADS | $4.99 | one-time |


## Frequently asked questions

### Is Optimising free?

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

### Is CNC Machinist Calculator free?

CNC Machinist Calculator is free to download, with in-app purchases available.

### Which has better reviews, Optimising or CNC Machinist Calculator?

CNC Machinist Calculator is rated higher. Optimising averages 2.8 out of 5 from 4 ratings, while CNC Machinist Calculator averages 5.0 from 1 ratings.

### Do Optimising or CNC Machinist Calculator have ads?

Neither Optimising nor CNC Machinist Calculator shows ads.

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

Optimising ships an update every 8 months, and CNC Machinist Calculator every 2 months. Most recently, Optimising was updated on November 1, 2026 and CNC Machinist Calculator on November 4, 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.*