# ST BLE Sensor Classic vs Helios EOS Timer

The clearest difference is update cadence: Helios EOS Timer at every 5 weeks against ST BLE Sensor Classic's every 6 months. ST BLE Sensor Classic's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 18.0). On price, ads and in-app purchases 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, Helios EOS Timer every 5 weeks. The most recent releases landed on October 4, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | ST BLE Sensor Classic | Helios EOS Timer |
| --- | --- | --- |
| 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 5 weeks** |
| Monetization | Free | — |
| Size | 71 MB | 4 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [STMicroelectronics](https://appshunter.io/developer/1801774735) | [Valormill](https://appshunter.io/developer/1793600782) |

## 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


### Helios EOS Timer

[App page](https://appshunter.io/ios/app/helios-eos-timer/id6741214830)

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

**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 Helios EOS Timer free?

Helios EOS Timer is free to download, with no in-app purchases.

### Do ST BLE Sensor Classic or Helios EOS Timer have ads?

Neither ST BLE Sensor Classic nor Helios EOS Timer shows ads.

### Which is updated more often, ST BLE Sensor Classic or Helios EOS Timer?

ST BLE Sensor Classic ships an update every 6 months, and Helios EOS Timer every 5 weeks. Most recently, ST BLE Sensor Classic was updated on October 4, 2026 and Helios EOS Timer on September 21, 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.*