# ST BLE Sensor Classic vs ETracking Expense

The clearest difference is update cadence: ETracking Expense at every 3 weeks against ST BLE Sensor Classic's every 6 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ST BLE Sensor Classic ships an update every 6 months, ETracking Expense every 3 weeks. The most recent releases landed on October 4, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | ST BLE Sensor Classic | ETracking Expense |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.3 (3 ratings)](https://appshunter.io/ios/app/st-ble-sensor-classic/id6447749695/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 71 MB | 21 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [STMicroelectronics](https://appshunter.io/developer/1801774735) | [vinh pham](https://appshunter.io/developer/1477047764) |

## 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


### ETracking Expense

[App page](https://appshunter.io/ios/app/etracking-expense/id6756063858)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ST BLE Sensor Classic free?

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

### Is ETracking Expense free?

ETracking Expense is free to download, with no in-app purchases.

### Do ST BLE Sensor Classic or ETracking Expense have ads?

Neither ST BLE Sensor Classic nor ETracking Expense shows ads.

### Which is updated more often, ST BLE Sensor Classic or ETracking Expense?

ST BLE Sensor Classic ships an update every 6 months, and ETracking Expense every 3 weeks. Most recently, ST BLE Sensor Classic was updated on October 4, 2026 and ETracking Expense on October 9, 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.*