Comparison

Bluetooth Controller BT/LE vs STL File Viewer Pro

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Bluetooth Controller BT/LE

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
Read full description

Easily test and control your Bluetooth projects with this versatile app, supporting Bluetooth Low Energy (BLE) communication. Ideal for developers and hobbyists working with Bluetooth-enabled devices, this app makes connecting and testing a breeze. BLE Mode: Optimized for smartphones, smartwatches, ESP modules, and custom BLE devices. Leverage Bluetooth Low Energy (BLE) for low-power, efficient device interactions, ideal for IoT projects and wearable tech. Gamepad Mode: Includes terminal modes and various data transfer features for Bluetooth-enabled gamepads and controllers. Easily manage and interact with compatible devices for enhanced control and functionality.

About

STL File Viewer Pro

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
Read full description

View, Rotate & Inspect Your 3D STL Files with Ease! Open any STL file in seconds — no sign-up, no clutter, just your 3D model ready to explore. STL File Viewer lets you load, rotate, zoom, and inspect 3D STL files directly on your iPhone or iPad. Built for speed, it handles everything from small parts to complex models smoothly. Whether you're reviewing jewelry CAD files before production, checking 3D print files for errors, or inspecting engineering designs on the go — this is the fastest way to view STL files on iOS. WHAT YOU GET: Instant file loading — open STL files from Files, email, AirDrop, or any app Full 360° control — rotate, zoom, and pan with intuitive touch gestures Measure STL file distance between 2 points Estimate STL File Weight in different materials Sharp detail rendering Light & dark mode — comfortable viewing anywhere Lightweight & fast — no bloat, no lag BUILT FOR: - 3D printing enthusiasts previewing files before printing - Jewelry designers reviewing CAD models - Engineers and architects inspecting parts on the go - Students and hobbyists exploring 3D models No account required. Just open and view using our simple STL Viewer App. Download now and see your CAD files the way they're meant to be seen. Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Bluetooth Controller BT/LE4 screens
STL File Viewer Pro3 screens

Verdict

The call

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). On price, update cadence, chart position and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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 20, 2026 respectively.

Scorecard6 real differences · 5 level
Bluetooth Controller BT/LE versus STL File Viewer Pro: the parameters behind the verdict, then further details
ParameterBluetooth Controller BT/LESTL File Viewer Pro
PriceFreeFree
Rating5.0 (1 ratings) — better4.5 (65 ratings)
Positive reviews10.0% of reviews
Number of ratings165 — better
Update frequencyEvery 3 weeksFortnightly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
Best chart rank#147#55 — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better16.6
Further details — not scored
Size22 MB16 MB
Age rating4+4+
DeveloperAlper VuralAndeesh Mehdi Syed

Customer experience

Bluetooth Controller BT/LE

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

STL File Viewer Pro

All ratings65 ratings
Positive86.2%
Neutral1.5%
Negative12.3%
Written reviews10 reviews
Positive10.0%
Neutral0.0%
Negative90.0%

In-app purchases

None

Bluetooth Controller BT/LE

No in-app purchases

3 purchases

STL File Viewer Pro

Subscriptions3
  • Weekly3 Days trial$1.997 Days
  • Monthly3 Days trial$3.991 Month
  • Ad Free for 1 Year3 Days trial$24.991 Year

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 20, 2026.
Which is more popular, Bluetooth Controller BT/LE or STL File Viewer Pro?
Bluetooth Controller BT/LE currently peaks at #147 in the App Store charts, and STL File Viewer Pro at #55. Chart position reflects recent download velocity rather than total install base.

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