# HemiPhysioData vs Watch Sensor Logger

The clearest difference is review sentiment: HemiPhysioData at 100% against Watch Sensor Logger's 50%. HemiPhysioData also leads on ads (none vs shown) and iOS requirement (13.2 vs 17.0). On price, update cadence, in-app purchases and monetization model there is nothing between them.

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

HemiPhysioData ships an update every 18 months, Watch Sensor Logger every 25 months. The most recent releases landed on September 29, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | HemiPhysioData | Watch Sensor Logger |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 18 months** | Every 25 months |
| Monetization | Free | Free |
| Size | 2 MB | 17 MB |
| Requires iOS | **13.2** | 17.0 |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Moez ur Rehman](https://appshunter.io/developer/1502416676) | [yuya kanbetsunawa](https://appshunter.io/developer/1597026161) |

## What reviewers say

### HemiPhysioData

[App page](https://appshunter.io/ios/app/hemiphysiodata/id1502983547)

This app collects raw and processed sensor data from your Apple Watch, including accelerometer and gyroscope readings. It allows you to select activities, preferences, and then exports the data as a CSV file to your iPhone for analysis. Ideal for tracking movement and Range of Motion (ROM) measurements.

**Highlights:** Collects raw and processed sensor data, User-friendly activity selection, Exports data as CSV files, Supports accelerometer and gyroscope, Configurable sampling rate, Haptic feedback for logging alerts

**In-app purchases:** none


### Watch Sensor Logger

[App page](https://appshunter.io/ios/app/watch-sensor-logger/id1634449655)

Log detailed motion and GPS data from your Apple Watch. Export sensor readings like acceleration, attitude, and location as a CSV file for analysis. This app is exclusively designed for Apple Watch.

**Highlights:** Log sensor data, GPS tracking, Export to CSV, Acceleration logging, Attitude data, Time stamping

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is HemiPhysioData free?

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

### Is Watch Sensor Logger free?

Watch Sensor Logger is free to download, with no in-app purchases.

### Do HemiPhysioData or Watch Sensor Logger have ads?

Watch Sensor Logger shows ads; HemiPhysioData does not.

### Which is updated more often, HemiPhysioData or Watch Sensor Logger?

HemiPhysioData ships an update every 18 months, and Watch Sensor Logger every 25 months. Most recently, HemiPhysioData was updated on September 29, 2026 and Watch Sensor Logger on October 10, 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.*