# iHarmonizer vs GCode Scanner for CNC Machines

iHarmonizer and GCode Scanner for CNC Machines both sit at 5.0 stars, but that hides the real split: 100% of GCode Scanner for CNC Machines's written reviews are positive against 0% of iHarmonizer's. GCode Scanner for CNC Machines also leads on update cadence (every 3 weeks vs every 3 months) and ratings volume (3 vs 1). iHarmonizer's advantage is iOS requirement (13.0 vs 16.4). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. iHarmonizer sells 5 one-off in-app purchases and GCode Scanner for CNC Machines sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for iHarmonizer against 5.0 for GCode Scanner for CNC Machines. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews are what separate them: 0% of iHarmonizer's written reviews are positive against 100% of GCode Scanner for CNC Machines's.

iHarmonizer ships an update every 3 months, GCode Scanner for CNC Machines every 3 weeks. The most recent releases landed on October 1, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | iHarmonizer | GCode Scanner for CNC Machines |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/iharmonizer/id488536254/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/gcode-scanner-for-cnc-machines/id6747010022/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 98 MB | 77 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Manufacturing Laboratories, Inc.](https://appshunter.io/developer/488536257) | [Jeremiah Moore](https://appshunter.io/developer/1695450531) |

## What reviewers say

### iHarmonizer

[App page](https://appshunter.io/ios/app/iharmonizer/id488536254)

Record machining noise, save files, and send for free evaluation. An in-app purchase allows for immediate, on-site analysis to detect chatter and suggest optimal spindle speeds.

**Highlights:** Record machining noise, Save audio files, Free MLI evaluation, In-app purchase for immediate analysis, Chatter detection, Suggests alternate spindle speeds, Indicates no stable spindle speed

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Regulations 10 Pack | $24.99 | one-time |
| Regulations 50 Pack | $99.99 | one-time |
| Regulations 100 Pack | $99.99 | one-time |
| Regulations 200 Pack | $299.99 | one-time |
| Regulations 500 Pack | $299.99 | one-time |


### 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 iHarmonizer free?

iHarmonizer is free to download, with in-app purchases available.

### 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, iHarmonizer or GCode Scanner for CNC Machines?

iHarmonizer and GCode Scanner for CNC Machines are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do iHarmonizer or GCode Scanner for CNC Machines have ads?

Neither iHarmonizer nor GCode Scanner for CNC Machines shows ads.

### Which is updated more often, iHarmonizer or GCode Scanner for CNC Machines?

iHarmonizer ships an update every 3 months, and GCode Scanner for CNC Machines every 3 weeks. Most recently, iHarmonizer was updated on October 1, 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.*