# ST BLE Sensor vs ZSWatch

The clearest difference is update cadence: ZSWatch at every 2 days against ST BLE Sensor's every 2 months. ZSWatch also leads on iOS requirement (13.0 vs 15.0). 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 ships an update every 2 months, ZSWatch every 2 days. The most recent releases landed on October 15, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | ST BLE Sensor | ZSWatch |
| --- | --- | --- |
| 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 2 days** |
| Monetization | Free | — |
| Size | 55 MB | 38 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [STMicroelectronics](https://appshunter.io/developer/1801774735) | [Jakob Krantz](https://appshunter.io/developer/1860622351) |

## 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


### ZSWatch

[App page](https://appshunter.io/ios/app/zswatch/id6759058602)

**Features:** macOS Compatibility

**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 ZSWatch free?

ZSWatch is free to download, with no in-app purchases.

### Do ST BLE Sensor or ZSWatch have ads?

Neither ST BLE Sensor nor ZSWatch shows ads.

### Which is updated more often, ST BLE Sensor or ZSWatch?

ST BLE Sensor ships an update every 2 months, and ZSWatch every 2 days. Most recently, ST BLE Sensor was updated on October 15, 2026 and ZSWatch on October 4, 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.*