# GM Pro AF vs GCode Scanner for CNC Machines

The clearest difference is rating: GCode Scanner for CNC Machines at 5.0 against GM Pro AF's 4.5. GM Pro AF's advantage is in-app purchases (none vs 3). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. GCode Scanner for CNC Machines sells 3 in-app purchases, starting at $4.99 per 7 days. GM Pro AF asks for nothing beyond the download.

GCode Scanner for CNC Machines holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 15, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | GM Pro AF | GCode Scanner for CNC Machines |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (2 ratings)](https://appshunter.io/ios/app/gm-pro-af/id6474267202/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/gcode-scanner-for-cnc-machines/id6747010022/reviews)** |
| Number of ratings | 2 | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 53 MB | 77 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Gorilla Tools, Inc](https://appshunter.io/developer/1480564474) | [Jeremiah Moore](https://appshunter.io/developer/1695450531) |

## What reviewers say

### 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


### GCode Scanner for CNC Machines

[App page](https://appshunter.io/ios/app/gcode-scanner-for-cnc-machines/id6747010022)

This tool allows users to view and simulate CNC machine code (G-code) and 3D model files (STL) before production. It helps prevent errors, save tools, and reduce setup times for machinists, programmers, and engineers.

**Highlights:** G-code viewer with real-time toolpath playback, Error detection for gouges and over-travels, STL model viewer, Universal G-code compatibility, Shop-floor ready interface, Import from cloud storage or local device

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Weekly Membership | $4.99 | per 7 days |
| Pro Monthly Membership | $7.99 | per month |
| Pro Annual Membership | $69.99 | per year |


## Frequently asked questions

### Is GM Pro AF free?

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

### Is GCode Scanner for CNC Machines free?

GCode Scanner for CNC Machines is free to download, with in-app purchases available.

### Which has better reviews, GM Pro AF or GCode Scanner for CNC Machines?

GCode Scanner for CNC Machines is rated higher. GM Pro AF averages 4.5 out of 5 from 2 ratings, while GCode Scanner for CNC Machines averages 5.0 from 3 ratings.

### Do GM Pro AF or GCode Scanner for CNC Machines have ads?

Neither GM Pro AF nor GCode Scanner for CNC Machines shows ads.

### Which is updated more often, GM Pro AF or GCode Scanner for CNC Machines?

GM Pro AF ships an update every 3 weeks, and GCode Scanner for CNC Machines every 3 weeks. Most recently, GM Pro AF was updated on September 15, 2026 and GCode Scanner for CNC Machines on September 27, 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.*