ST BLE Sensor vs Helios EOS Timer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ST BLE Sensor
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.
- Access sensor data
- Log data to cloud
- Update board firmware
- Explore demo functionalities
- Bluetooth Low Energy communication
- Motion-sensor data fusion
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The ST BLE Sensor application is used in conjunction with an ST development board and firmware compatible with the BlueST protocol to give you access to all the sensor data, which you can log to different cloud providers, and to update the board firmware directly from a mobile device via the Bluetooth® Low Energy protocol. After discovery ST development board, the app shows you a list of available demos and you can navigate through them to discover the functionalities of your board. Demos can be related about environmental, cloud, audio, board configuration, machine learning and and many other functionalities. The application is built on top of the BlueST SDK library implementing the BlueST protocol and helps you export the data easily via Bluetooth® Low Energy. The application also supports firmware library algorithms like motion-sensor data fusion, activity recognition and pedometer functionality. Both SDK and application source code are freely available at: https://github.com/STMicroelectronics
Helios EOS Timer
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The Helios EOS Timer app is a comprehensive tool to configure the functionality of the EOS Timer. Examples include setting the functional mode, batch frequency, and PPM. Live data is also displayed in the app such as temperature, flow rate, and solar panel volts and amps.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | ST BLE Sensor | Helios EOS Timer |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (10 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 10 — better | — |
| Update frequency | Every 2 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 55 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | STMicroelectronics | Valormill |
In-app purchases
ST BLE Sensor
No in-app purchases
Helios EOS Timer
No in-app purchases
Questions
Is ST BLE Sensor free?
Is Helios EOS Timer free?
Do ST BLE Sensor or Helios EOS Timer have ads?
Which is updated more often, ST BLE Sensor or Helios EOS Timer?
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