# STL Viewer vs Ego Chat

The clearest difference is price: Ego Chat at Free against STL Viewer's $0.99. Ego Chat also leads on in-app purchases (none vs 5) and update cadence (every 4 days vs every 4 weeks). On ads and device support there is nothing between them.

Ego Chat is free to download; STL Viewer costs $0.99 up front. STL Viewer sells 5 in-app purchases, starting at $2.99 per month. Ego Chat asks for nothing beyond the download.

STL Viewer ships an update every 4 weeks, Ego Chat every 4 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | STL Viewer | Ego Chat |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/stl-viewer-3d-mesh/id6445801487/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 4 days** |
| Monetization | Paid | — |
| Size | 5 MB | 36 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [Felipe Marques de Barros](https://appshunter.io/developer/1459294806) | [Ethan Ratnarajah](https://appshunter.io/developer/6791926826) |

## What reviewers say

### STL Viewer

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

View, explore, and edit 3D models on your iPhone or iPad. Basic viewing is included with purchase, with optional upgrades for advanced creation, editing, and reporting features. Models are processed locally for privacy.

**Highlights:** Open and view STL files, Rotate, pan, and zoom models, Basic model information inspection, Create and edit 3D models, Measure distances and angles, Export to multiple file formats, Generate local PDF 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 |


### Ego Chat

[App page](https://appshunter.io/ios/app/ego-chat/id6791926824)

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

**In-app purchases:** none


## Frequently asked questions

### Is STL Viewer free?

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

### Is Ego Chat free?

Ego Chat is free to download, with no in-app purchases.

### Do STL Viewer or Ego Chat have ads?

Neither STL Viewer nor Ego Chat shows ads.

### Which is updated more often, STL Viewer or Ego Chat?

STL Viewer ships an update every 4 weeks, and Ego Chat every 4 days. Most recently, STL Viewer was updated on November 3, 2026 and Ego Chat 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.*