# Harv3d vs STL Viewer

The clearest difference is ads: Harv3d at none against STL Viewer's shown. STL Viewer's advantage is update cadence (fortnightly vs every 3 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Harv3d sells 1 one-off in-app purchase and STL Viewer sells 8 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Harv3d ships an update every 3 months, STL Viewer fortnightly. Both last shipped on October 31, 2026.

## The numbers

| Metric | Harv3d | STL Viewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Fortnightly** |
| Size | 28 MB | 48 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SAMUEL R HARVEY](https://appshunter.io/developer/1737755904) | [Sahana A S](https://appshunter.io/developer/1800491118) |

## What reviewers say

### Harv3d

[App page](https://appshunter.io/ios/app/harv3d/id6776918959)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $4.99 | one-time |


### STL Viewer

[App page](https://appshunter.io/ios/app/stl-viewer-3d-print-and-g-code/id6813788641)

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LayerPeek Pro Monthly | $1.99 | per month |
| Pro Lifetime Limited Offer | $5.99 | one-time |
| Pro Lifetime Limited Offer | $7.99 | one-time |
| Pro Lifetime Limited Offer | $9.99 | one-time |
| Pro Lifetime Limited Offer | $11.99 | one-time |
| Pro Lifetime Limited Offer | $13.99 | one-time |
| Pro Lifetime Limited Offer | $15.99 | one-time |
| LayerPeek Pro Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is Harv3d free?

Harv3d is free to download, with in-app purchases available.

### Is STL Viewer free?

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

### Do Harv3d or STL Viewer have ads?

STL Viewer shows ads; Harv3d does not.

### Which is updated more often, Harv3d or STL Viewer?

Harv3d ships an update every 3 months, and STL Viewer fortnightly. Most recently, Harv3d was updated on October 31, 2026 and STL Viewer on October 31, 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.*