# ST BLE Sensor vs Helios EOS Timer

The clearest difference is device support: ST BLE Sensor at 3 against Helios EOS Timer's 1. ST BLE Sensor also leads on iOS requirement (15.0 vs 18.0). On price, update cadence, 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 ships an update every 2 months, Helios EOS Timer every 5 weeks. The most recent releases landed on October 1, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | ST BLE Sensor | Helios EOS Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (10 ratings)](https://appshunter.io/ios/app/st-ble-sensor/id993670214/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 55 MB | 4 MB |
| Requires iOS | **15.0** | 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

[App page](https://appshunter.io/ios/app/st-ble-sensor/id993670214)

This app connects to ST development boards via Bluetooth Low Energy to access sensor data. You can log data to cloud providers, update board firmware, and explore various demo functionalities like environmental sensing and machine learning.

**Highlights:** Access sensor data, Log data to cloud, Update board firmware, Explore demo functionalities, Bluetooth Low Energy communication, Motion-sensor data fusion

**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 free?

ST BLE Sensor 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 or Helios EOS Timer have ads?

Neither ST BLE Sensor nor Helios EOS Timer shows ads.

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

ST BLE Sensor ships an update every 2 months, and Helios EOS Timer every 5 weeks. Most recently, ST BLE Sensor was updated on October 1, 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.*