# HemiPhysioData — Collect Activities Sensor Data

> Apple Watch sensor data collection and export for movement analysis. (iPhone/iPad app by Moez ur Rehman.)

- Source: https://appshunter.io/ios/app/hemiphysiodata/id1502983547 (this page in markdown: same URL + `.md`)
- Developer: [Moez ur Rehman](https://appshunter.io/developer/1502416676)
- Category: Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 13.2 · 2 MB
- Languages: English
- Released: 2020-08-08
- Data updated: 2026-06-04
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/hemiphysiodata/id1502983547/reviews.md

## What is HemiPhysioData?

HemiPhysioData serves as an Apple Watch app designed to gather both raw and processed data from the watch's built-in sensors, such as the accelerometer and gyroscope. Its user-friendly interface allows users to effortlessly select different activities and preferences. The collected sensor data, along with additional specified values, is then neatly stored in a CSV file. These CSV files can be easily transferred to the user's iPhone for further processing and analysis. The app is specifically tailored for individuals seeking to collect movement data or Range of Motion (ROM) measurements, with the added benefit of utilizing the data for analytics and machine learning. Users have the flexibility to choose the activity type, movement type, sampling rate (samples per second), and indicate which wrist they wear the watch on, as well as whether it's their dominant or non-dominant side.

Some details on screenshots:

UID: Predefined twenty users (U01-U20)
Activity: Movements (upper limb), Walking, Running, Misc
Move Type: It corresponds to the selected activity
Interval-Hertz: Samples per second (up to 100 samples per second)
Dominant Side: Enable it when watch is on wrist of dominant arm
Right Wrist: Enable it when watch is on right wrist 
Haptic-Feedback: When enabled, the user can set the ‘Starts In’ time and the logging ‘Duration'. The user gets the alert when the logging starts (when the starts-in time finishes) and ends (when the duration finishes). Use this option to log activity related data only. It saves from data cleaning later.
Logged Files: Shows all saved CSV files on watch. The user can select a file to send to the iPhone or delete from watch.

The following sensor data of the Apple Watch (WatchOS) is saved in the CSV file:
- Device Motion Processed Data: roll, pitch, yaw, rotation rate x, rotation rate y, rotation rate z, gravity x, gravity y, gravity z, user acceleration x, user acceleration y, user acceleration z, quaternion x, quaternion y, quaternion z, quaternion z.
-Accelerometer Raw Data: Acceleration x, y, and z

## Key features

- 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

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/hemiphysiodata/id1502983547/reviews.md

### 5/5 — easy

*2022-04-27*

easy to use, would love to know how the data has been "processed"

## Frequently asked questions about HemiPhysioData

### What kind of sensor data does HemiPhysioData collect?

HemiPhysioData collects Device Motion Processed Data, including roll, pitch, yaw, rotation rates, gravity, user acceleration, and quaternions. It also captures raw accelerometer data for acceleration in x, y, and z directions.

### How is the collected data stored and accessed?

The collected sensor data is stored in a CSV file directly on the Apple Watch. Users can then easily transfer these CSV files to their iPhone for further processing and analysis.

### Can I customize the data collection process with HemiPhysioData?

Yes, you can customize the activity type, movement type, sampling rate (up to 100 samples per second), and specify which wrist you wear the watch on, as well as if it's your dominant or non-dominant arm.

### What is the purpose of the haptic feedback feature?

The haptic feedback feature allows users to set a 'Starts In' time and a logging 'Duration'. You will receive alerts when logging begins and ends, which is useful for logging activity-related data and saving time on data cleaning.

### Is HemiPhysioData available on other devices besides Apple Watch?

HemiPhysioData is primarily an Apple Watch app, but the collected data can be transferred to an iPhone for analysis. It is supported on watch, iPhone, and iPod.

### How frequently is HemiPhysioData updated?

The latest version of HemiPhysioData is 1.1, which was last updated on August 1, 2023. This indicates a relatively recent update, suggesting ongoing development and support.

### What is the age rating for HemiPhysioData?

HemiPhysioData has an age rating of 4+, making it suitable for a wide range of users, including children and adults interested in sensor data collection.

### Does HemiPhysioData have ads?

No, HemiPhysioData does not contain advertisements. It is a free application without any in-app purchases or ads, providing an uninterrupted user experience.

## Version history (last 3 releases)

### 1.1 — 2023-08-01

Bug fixed causing app crash.

### 1.0.1 — 2023-07-26

- CSV file saves logging time in milliseconds as well.
- Privacy & Support link (URL) changed!

### 1.0 — 2020-08-08

No release notes.

## Apps similar to HemiPhysioData

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Acc.elerometer](https://appshunter.io/ios/app/accelerometer/id1631020465) | — | Free | Utilities |
| [Smartracker Remote](https://appshunter.io/ios/app/smartracker-remote/id1484614241) | — | Free | Utilities |
| [Sensor-App](https://appshunter.io/ios/app/sensor-app/id1466399692) | 5.0 (3) | Free | Utilities |
| [Sensor Data Recorder](https://appshunter.io/ios/app/sensor-data-recorder/id1438400138) | 3.0 (2) | Free | Utilities |
| [BLE HOST](https://appshunter.io/ios/app/ble-host/id1522679997) | — | Free | Utilities |
| [LARK CamHD](https://appshunter.io/ios/app/lark-camhd/id1593526643) | 5.0 (1) | Free | Utilities |

## More apps by Moez ur Rehman

- [HemiRehab](https://appshunter.io/ios/app/hemirehab/id1562682046)

All apps by Moez ur Rehman: https://appshunter.io/developer/1502416676

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-04.*