# STL Viewer vs Deadline Countdown

The clearest difference is price: Deadline Countdown at Free against STL Viewer's $0.99. Deadline Countdown also leads on update cadence (fortnightly vs every 22 months). STL Viewer's advantage is chart position (#133 vs unranked). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Deadline Countdown is free to download; STL Viewer costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

STL Viewer ships an update every 22 months, Deadline Countdown fortnightly. Both last shipped on October 22, 2026.

## The numbers

| Metric | STL Viewer | Deadline Countdown |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 22 months | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Best chart rank | **#133** | — |
| Size | 4 MB | 1 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | **iPhone, Mac, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Felipe Marques de Barros](https://appshunter.io/developer/1459294806) | [Myworkingmemory LLC](https://appshunter.io/developer/1892099684) |

## What reviewers say

### STL Viewer

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

**Currently charting:** #133 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


### Deadline Countdown

[App page](https://appshunter.io/ios/app/deadline-countdown-stay-sharp/id6777861464)

**In-app purchases:** none


## Frequently asked questions

### Is STL Viewer free?

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

### Is Deadline Countdown free?

Deadline Countdown is free to download, with no in-app purchases.

### Do STL Viewer or Deadline Countdown have ads?

Neither STL Viewer nor Deadline Countdown shows ads.

### Which is updated more often, STL Viewer or Deadline Countdown?

STL Viewer ships an update every 22 months, and Deadline Countdown fortnightly. Most recently, STL Viewer was updated on October 22, 2026 and Deadline Countdown on October 22, 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.*