Comparison

ST BLE Sensor Classic vs Helios EOS Timer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ST BLE Sensor Classic

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
Read full description

The ST BLE Sensor Classic 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. Cloud side, ST BLE Sensor can communicate with Microsoft Azure IoT Central, Aws IoT and ST Asset Tracking dashboard. 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

About

Helios EOS Timer

Features
Read full description

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

ST BLE Sensor Classic4 screens
Helios EOS Timer3 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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.

Scorecard3 real differences · 6 level
ST BLE Sensor Classic versus Helios EOS Timer: the parameters behind the verdict, then further details
ParameterST BLE Sensor ClassicHelios EOS Timer
PriceFreeFree
Rating2.3 (3 ratings) — better—
Number of ratings3 — better—
Update frequencyEvery 6 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better18.0
Further details — not scored
Size71 MB4 MB
Age rating4+4+
DeveloperSTMicroelectronicsValormill

In-app purchases

None

ST BLE Sensor Classic

No in-app purchases

None

Helios EOS Timer

No in-app purchases

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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