# Bluetooth Controller BT/LE vs STL File Viewer Pro

The clearest difference is rating: Bluetooth Controller BT/LE at 5.0 against STL File Viewer Pro's 4.5. Bluetooth Controller BT/LE also leads on in-app purchases (none vs 3) and ads (none vs shown). STL File Viewer Pro's advantage is ratings volume (65 vs 1) and chart position (#33 vs #160). On price, update cadence and device support there is nothing between them.

Both are free to download. STL File Viewer Pro sells 3 in-app purchases, starting at $1.99 per 7 days. Bluetooth Controller BT/LE asks for nothing beyond the download.

Bluetooth Controller BT/LE holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: STL File Viewer Pro has 65 ratings behind it against 1, so its average is the more settled of the two.

Bluetooth Controller BT/LE ships an update every 3 weeks, STL File Viewer Pro fortnightly. The most recent releases landed on September 22, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Bluetooth Controller BT/LE | STL File Viewer Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/bluetooth-controller-btle/id6739386030/reviews)** | [4.5 (65 ratings)](https://appshunter.io/ios/app/stl-file-viewer-pro/id6741022143/reviews) |
| Number of ratings | 1 | **65** |
| Positive reviews | — | 10.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Best chart rank | #160 | **#33** |
| Size | 22 MB | 16 MB |
| Requires iOS | **13.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Alper Vural](https://appshunter.io/developer/1728214585) | [Andeesh Mehdi Syed](https://appshunter.io/developer/1676226599) |

## What reviewers say

### Bluetooth Controller BT/LE

[App page](https://appshunter.io/ios/app/bluetooth-controller-btle/id6739386030)

**Currently charting:** #160 Top Free · Developer Tools (US App Store)

This app allows developers and hobbyists to test and control Bluetooth devices, particularly those using Bluetooth Low Energy (BLE). It offers modes for BLE communication with various devices and for interacting with Bluetooth-enabled gamepads and controllers.

**Highlights:** Bluetooth Low Energy (BLE) testing, Control Bluetooth-enabled gamepads, Terminal modes for data transfer, Support for ESP modules and custom devices, Optimized for smartphones and smartwatches

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

**In-app purchases:** none


### STL File Viewer Pro

[App page](https://appshunter.io/ios/app/stl-file-viewer-pro/id6741022143)

**Currently charting:** #33 Top Grossing · Developer Tools, #107 Top Free · Developer Tools (US App Store)

Easily view, rotate, and inspect 3D STL files on your iPhone or iPad. Load models instantly from various sources for 3D printing, design review, or engineering inspection.

**Highlights:** Instant STL file loading, Full 360° rotation and zoom, Sharp detail rendering, Light and dark mode support, Lightweight and fast performance, Open files from Files, email, AirDrop

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $1.99 | per 7 days |
| Monthly | $3.99 | per month |
| Ad Free for 1 Year | $24.99 | per year |


## Frequently asked questions

### Is Bluetooth Controller BT/LE free?

Bluetooth Controller BT/LE is free to download, with no in-app purchases.

### Is STL File Viewer Pro free?

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

### Which has better reviews, Bluetooth Controller BT/LE or STL File Viewer Pro?

Bluetooth Controller BT/LE is rated higher. Bluetooth Controller BT/LE averages 5.0 out of 5 from 1 ratings, while STL File Viewer Pro averages 4.5 from 65 ratings.

### Do Bluetooth Controller BT/LE or STL File Viewer Pro have ads?

STL File Viewer Pro shows ads; Bluetooth Controller BT/LE does not.

### Which is updated more often, Bluetooth Controller BT/LE or STL File Viewer Pro?

Bluetooth Controller BT/LE ships an update every 3 weeks, and STL File Viewer Pro fortnightly. Most recently, Bluetooth Controller BT/LE was updated on September 22, 2026 and STL File Viewer Pro on September 24, 2026.

### Which is more popular, Bluetooth Controller BT/LE or STL File Viewer Pro?

Bluetooth Controller BT/LE currently peaks at #160 in the App Store charts, and STL File Viewer Pro at #33. Chart position reflects recent download velocity rather than total install base.

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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.*