# STL Viewer vs Focus Grove

The clearest difference is price: STL Viewer at $0.99 against Focus Grove's $19.99. STL Viewer also leads on in-app purchases (none vs 1) and chart position (#146 vs unranked). Focus Grove's advantage is update cadence (monthly vs every 22 months) and iOS requirement (15.0 vs 17.0). On ads and device support there is nothing between them.

STL Viewer costs $0.99 and Focus Grove $19.99 up front. Focus Grove sells 1 in-app purchase, starting at $4.99 per month. STL Viewer asks for nothing beyond the download.

STL Viewer ships an update every 22 months, Focus Grove monthly. The most recent releases landed on October 22, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | STL Viewer | Focus Grove |
| --- | --- | --- |
| Price | **$0.99** | $19.99 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 22 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Best chart rank | **#146** | — |
| Size | 4 MB | 15 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Felipe Marques de Barros](https://appshunter.io/developer/1459294806) | [INSPECTOR STUDIOS TEKNOLOJİ BİLİŞİM YAZILIM PAZARLAMA LİMİTED ŞİRKETİ](https://appshunter.io/developer/1489612332) |

## What reviewers say

### STL Viewer

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

**Currently charting:** #146 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:** none


### Focus Grove

[App page](https://appshunter.io/ios/app/focus-grove-pomodoro-timer/id6759844607)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Focus Grove Premium Monthly | $4.99 | per month |


## Frequently asked questions

### Is STL Viewer free?

STL Viewer costs $0.99, with no in-app purchases.

### Is Focus Grove free?

Focus Grove costs $19.99, and also offers in-app purchases.

### Do STL Viewer or Focus Grove have ads?

Neither STL Viewer nor Focus Grove shows ads.

### Which is updated more often, STL Viewer or Focus Grove?

STL Viewer ships an update every 22 months, and Focus Grove monthly. Most recently, STL Viewer was updated on October 22, 2026 and Focus Grove on October 14, 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.*