# ST BLE Sensor Classic vs Iris Waterlog®

The clearest difference is update cadence: Iris Waterlog® at weekly against ST BLE Sensor Classic's every 6 months. ST BLE Sensor Classic's advantage is iOS requirement (13.0 vs 15.1). 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, Iris Waterlog® weekly. The most recent releases landed on October 4, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | ST BLE Sensor Classic | Iris Waterlog® |
| --- | --- | --- |
| 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 | **Weekly** |
| Monetization | Free | — |
| Size | 71 MB | 55 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [STMicroelectronics](https://appshunter.io/developer/1801774735) | [WATERLOG TECNOLOGIA LTDA](https://appshunter.io/developer/1728447443) |

## 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


### Iris Waterlog®

[App page](https://appshunter.io/ios/app/iris-waterlog/id6741683487)

**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 Iris Waterlog® free?

Iris Waterlog® is free to download, with no in-app purchases.

### Do ST BLE Sensor Classic or Iris Waterlog® have ads?

Neither ST BLE Sensor Classic nor Iris Waterlog® shows ads.

### Which is updated more often, ST BLE Sensor Classic or Iris Waterlog®?

ST BLE Sensor Classic ships an update every 6 months, and Iris Waterlog® weekly. Most recently, ST BLE Sensor Classic was updated on October 4, 2026 and Iris Waterlog® on September 18, 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.*