# Optimising vs GM Pro AF

The clearest difference is rating: GM Pro AF at 4.5 against Optimising's 2.8. GM Pro AF also leads on update cadence (every 3 weeks vs every 8 months). Optimising's advantage is iOS requirement (9.0 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 2.8. Both are backed by a comparable volume of ratings — 4 and 2 respectively.

Optimising ships an update every 8 months, GM Pro AF every 3 weeks. The most recent releases landed on October 12, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Optimising | GM Pro AF |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.8 (4 ratings)](https://appshunter.io/ios/app/optimising/id868624456/reviews) | **[4.5 (2 ratings)](https://appshunter.io/ios/app/gm-pro-af/id6474267202/reviews)** |
| Number of ratings | **4** | 2 |
| Positive reviews | 62.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 8 MB | 53 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Guhring Pty. Ltd.](https://appshunter.io/developer/868624459) | [Gorilla Tools, Inc](https://appshunter.io/developer/1480564474) |

## 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


### 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 Optimising free?

Optimising 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, Optimising or GM Pro AF?

GM Pro AF is rated higher. Optimising averages 2.8 out of 5 from 4 ratings, while GM Pro AF averages 4.5 from 2 ratings.

### Do Optimising or GM Pro AF have ads?

Neither Optimising nor GM Pro AF shows ads.

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

Optimising ships an update every 8 months, and GM Pro AF every 3 weeks. Most recently, Optimising was updated on October 12, 2026 and GM Pro AF on October 3, 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.*