# GCode Scanner for CNC Machines vs STLLens

The clearest difference is price: GCode Scanner for CNC Machines at Free against STLLens's $0.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

GCode Scanner for CNC Machines is free to download; STLLens costs $0.99 up front. GCode Scanner for CNC Machines sells 3 in-app purchases, starting at $4.99 per 7 days and STLLens sells 3 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

GCode Scanner for CNC Machines ships an update every 3 weeks, STLLens fortnightly. The most recent releases landed on October 28, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | GCode Scanner for CNC Machines | STLLens |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/gcode-scanner-for-cnc-machines/id6747010022/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 77 MB | 60 MB |
| Requires iOS | **16.4** | 16.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jeremiah Moore](https://appshunter.io/developer/1695450531) | [楠楠 李](https://appshunter.io/developer/1790338557) |

## What reviewers say

### 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 |


### STLLens

[App page](https://appshunter.io/ios/app/stllens-3d-model-viewer/id6787116955)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Month Vip | $7.99 | per month |
| Year Vip | $14.99 | per year |
| LifeTime | $19.99 | one-time |


## Frequently asked questions

### Is GCode Scanner for CNC Machines free?

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

### Is STLLens free?

STLLens costs $0.99, and also offers in-app purchases.

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

Neither GCode Scanner for CNC Machines nor STLLens shows ads.

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

GCode Scanner for CNC Machines ships an update every 3 weeks, and STLLens fortnightly. Most recently, GCode Scanner for CNC Machines was updated on October 28, 2026 and STLLens on October 15, 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.*