# STL Viewer vs Screen Time

The clearest difference is price: Screen Time at Free against STL Viewer's $0.99. Screen Time also leads on update cadence (every 11 days vs every 6 weeks). STL Viewer's advantage is chart position (#137 vs unranked). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Screen Time is free to download; STL Viewer costs $0.99 up front. STL Viewer sells 5 in-app purchases, starting at $2.99 per month and Screen Time sells 2 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

STL Viewer ships an update every 6 weeks, Screen Time every 11 days. The most recent releases landed on October 27, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | STL Viewer | Screen Time |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 11 days** |
| Monetization | Free with in-app purchases | — |
| Best chart rank | **#137** | — |
| Size | 5 MB | 5 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Felipe Marques de Barros](https://appshunter.io/developer/1459294806) | [HANSIFY TECHNOLOGIES](https://appshunter.io/developer/1814646308) |

## What reviewers say

### STL Viewer

[App page](https://appshunter.io/ios/app/stl-viewer-3d-print-and-mesh/id6445801487)

**Currently charting:** #137 Top Paid · Productivity (US App Store)

Visualize e inspecione modelos 3D STL em seu dispositivo. Oferece ferramentas avançadas para medição, análise de malha e geração de relatórios PDF. Ideal para engenharia, impressão 3D e revisão técnica.

**Highlights:** Multitouch rotation, pan, and zoom, Wireframe, X-Ray, and normal orientation modes, Precise point-to-point measurement, Interactive cutting plane, Mesh health diagnostics, Generate PDF technical reports

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| STL Viewer Pro Mensal | $2.99 | per month |
| STL Viewer Studio Mensal | $5.99 | per month |
| STL Viewer Pro Anual | $22.99 | per year |
| STL Viewer Studio Anual | $49.99 | per year |
| STL Viewer Pro Vitalício | $39.99 | one-time |


### Screen Time

[App page](https://appshunter.io/ios/app/screen-time-focusblock/id6788488118)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $0.99 | per 7 days |
| Lifetime Access | $9.99 | one-time |


## Frequently asked questions

### Is STL Viewer free?

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

### Is Screen Time free?

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

### Do STL Viewer or Screen Time have ads?

Neither STL Viewer nor Screen Time shows ads.

### Which is updated more often, STL Viewer or Screen Time?

STL Viewer ships an update every 6 weeks, and Screen Time every 11 days. Most recently, STL Viewer was updated on October 27, 2026 and Screen Time 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.*