# Machining Calculator vs GM Pro AF

The clearest difference is update cadence: GM Pro AF at every 3 weeks against Machining Calculator's every 5 months. GM Pro AF also leads on rating (4.5 vs 4.3). Machining Calculator's advantage is iOS requirement (13.0 vs 15.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

GM Pro AF holds the better App Store score, 4.5 against 4.3. Both are backed by a comparable volume of ratings — 4 and 2 respectively.

Machining Calculator ships an update every 5 months, GM Pro AF every 3 weeks. Both last shipped on October 20, 2026.

## The numbers

| Metric | Machining Calculator | GM Pro AF |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (4 ratings)](https://appshunter.io/ios/app/machining-calculator/id389011280/reviews) | **[4.5 (2 ratings)](https://appshunter.io/ios/app/gm-pro-af/id6474267202/reviews)** |
| Number of ratings | **4** | 2 |
| Positive reviews | 54.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 5 MB | 53 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Sandvik Coromant AB](https://appshunter.io/developer/1789776926) | [Gorilla Tools, Inc](https://appshunter.io/developer/1480564474) |

## What reviewers say

### Machining Calculator

[App page](https://appshunter.io/ios/app/machining-calculator/id389011280)

This app helps engineers and operators optimize machining performance by calculating optimal cut settings for turning, milling, drilling, and tapping. It demonstrates how minor parameter adjustments can significantly impact overall results.

**Highlights:** Calculate cut settings, Optimize turning performance, Optimize milling performance, Optimize drilling performance, Optimize tapping performance, Demonstrates parameter impact

**Features:** macOS Compatibility

**In-app purchases:** none


### GM Pro AF

[App page](https://appshunter.io/ios/app/gm-pro-af/id6474267202)

This app instantly configures running parameters for machining cutters, calculating RPM, IPM, SFM, and Chimp-Loads for various materials. It provides confidence and swagger for shop floor operations and allows sharing of findings.

**Highlights:** Instant configuration of running parameters, Calculates RPM, IPM, SFM, and Chimp-Loads, Supports a wide variety of machining materials, Quick calculations without lengthy questionnaires, Share machining findings

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Machining Calculator free?

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

### Is GM Pro AF free?

GM Pro AF is free to download, with no in-app purchases.

### Which has better reviews, Machining Calculator or GM Pro AF?

GM Pro AF is rated higher. Machining Calculator averages 4.3 out of 5 from 4 ratings, while GM Pro AF averages 4.5 from 2 ratings.

### Do Machining Calculator or GM Pro AF have ads?

Neither Machining Calculator nor GM Pro AF shows ads.

### Which is updated more often, Machining Calculator or GM Pro AF?

Machining Calculator ships an update every 5 months, and GM Pro AF every 3 weeks. Most recently, Machining Calculator was updated on October 20, 2026 and GM Pro AF on October 20, 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.*