# ST BLE Sensor Classic vs Lecture Translation

The clearest difference is in-app purchases: ST BLE Sensor Classic at none against Lecture Translation's 9. Lecture Translation's advantage is update cadence (every 6 weeks vs every 6 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Lecture Translation sells 9 in-app purchases, starting at $2.99 per month. ST BLE Sensor Classic asks for nothing beyond the download.

ST BLE Sensor Classic ships an update every 6 months, Lecture Translation every 6 weeks. The most recent releases landed on October 21, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | ST BLE Sensor Classic | Lecture Translation |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.3 (3 ratings)](https://appshunter.io/ios/app/st-ble-sensor-classic/id6447749695/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 6 weeks** |
| Monetization | Free | — |
| Size | 71 MB | 92 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [STMicroelectronics](https://appshunter.io/developer/1801774735) | [IT Source One](https://appshunter.io/developer/1642164409) |

## What reviewers say

### ST BLE Sensor Classic

[App page](https://appshunter.io/ios/app/st-ble-sensor-classic/id6447749695)

This app connects to ST development boards via Bluetooth Low Energy to access sensor data. It allows logging data to cloud providers and updating board firmware directly from your mobile device.

**Highlights:** Access sensor data, Log data to cloud providers, Update board firmware, Discover board functionalities, Supports motion-sensor data fusion, Activity recognition, Pedometer functionality

**Features:** macOS Compatibility

**In-app purchases:** none


### Lecture Translation

[App page](https://appshunter.io/ios/app/lecture-translation/id6751921368)

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Listener Basic | $2.99 | per month |
| Listener Standard | $4.99 | per month |
| Listener Premium | $9.99 | per month |
| Speaker Basic | $19.99 | per month |
| Speaker Expanded | $59.99 | per month |
| Speaker Enterprise | $199.99 | per month |
| Extra Hour | $4.99 | one-time |
| Additional Storage | $4.99 | one-time |
| One Time Lecture | $5.99 | one-time |


## Frequently asked questions

### Is ST BLE Sensor Classic free?

ST BLE Sensor Classic is free to download, with no in-app purchases.

### Is Lecture Translation free?

Lecture Translation is free to download, with in-app purchases available.

### Do ST BLE Sensor Classic or Lecture Translation have ads?

Neither ST BLE Sensor Classic nor Lecture Translation shows ads.

### Which is updated more often, ST BLE Sensor Classic or Lecture Translation?

ST BLE Sensor Classic ships an update every 6 months, and Lecture Translation every 6 weeks. Most recently, ST BLE Sensor Classic was updated on October 21, 2026 and Lecture Translation on October 25, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*