# STL Preview vs Pathly

The clearest difference is ads: Pathly at none against STL Preview's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. STL Preview sells 1 one-off in-app purchase and Pathly sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

STL Preview ships an update every 3 days, Pathly every 2 days. The most recent releases landed on October 5, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | STL Preview | Pathly |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 days | **Every 2 days** |
| Size | 34 MB | 1 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Enes Akkus](https://appshunter.io/developer/1416782412) | [Jhomar Maravillas](https://appshunter.io/developer/6783703541) |

## What reviewers say

### STL Preview

[App page](https://appshunter.io/ios/app/stl-preview/id6773179410)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.49 | one-time |


### Pathly

[App page](https://appshunter.io/ios/app/pathly-g-code-viewer/id6792144397)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Unlimited | $4.99 | one-time |


## Frequently asked questions

### Is STL Preview free?

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

### Is Pathly free?

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

### Do STL Preview or Pathly have ads?

STL Preview shows ads; Pathly does not.

### Which is updated more often, STL Preview or Pathly?

STL Preview ships an update every 3 days, and Pathly every 2 days. Most recently, STL Preview was updated on October 5, 2026 and Pathly on October 7, 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.*