# 2TBox vs STL Viewer

The clearest difference is in-app purchases: 2TBox at none against STL Viewer's 2. 2TBox also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. STL Viewer sells 2 in-app purchases, starting at $1.99 per month. 2TBox asks for nothing beyond the download.

2TBox ships an update weekly, STL Viewer every 6 days. The most recent releases landed on October 16, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | 2TBox | STL Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/2tbox/id6803047350/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Weekly | **Every 6 days** |
| Monetization | Free | — |
| Size | 30 MB | 48 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Natallia Samoilava](https://appshunter.io/developer/6803047352) | [Sahana A S](https://appshunter.io/developer/1800491118) |

## What reviewers say

### 2TBox

[App page](https://appshunter.io/ios/app/2tbox/id6803047350)

This app connects to a diagnostic device for motorcycle ECUs, providing live readings, fault code management, and service interval tracking. It allows for real-time graphing of parameters and device firmware updates. A demo mode is available for exploration without the physical device.

**Highlights:** Live ECU readings, Fault code display and clearing, Service interval tracking, Engine hour monitoring, Real-time parameter graphing, Device settings and firmware updates

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

**In-app purchases:** none


### 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 (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LayerPeek Pro Monthly | $1.99 | per month |
| LayerPeek Pro Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is 2TBox free?

2TBox is free to download, with no in-app purchases.

### Is STL Viewer free?

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

### Do 2TBox or STL Viewer have ads?

STL Viewer shows ads; 2TBox does not.

### Which is updated more often, 2TBox or STL Viewer?

2TBox ships an update weekly, and STL Viewer every 6 days. Most recently, 2TBox was updated on October 16, 2026 and STL Viewer on October 19, 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.*