Sensor vs HemiPhysioData
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sensor
Access and utilize all your device's sensors with this comprehensive tool. Explore GPS, gyroscope, acceleration, magnetometer, altimeter, and attitude data for various applications and research.
- Access GPS for precise location
- Utilize gyroscope for orientation
- Measure acceleration and movement
- Detect magnetic fields with magnetometer
- Access altimeter and pressure data
- Monitor device attitude (roll, pitch, yaw)
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Unlock the full potential of your iPhone and iPad with Sensor-App, the ultimate tool for accessing and utilizing all of your device's sensors. Whether you're an enthusiast, a developer, or simply curious about your device's capabilities, Sensor-App offers a comprehensive suite of tools at your fingertips. Explore a plethora of sensors including: - **GPS**: Navigate with precision and track your device’s exact location. - **Gyroscope**: Experience precise orientation and rotation insights for enhanced application performance. - **Acceleration Sensor**: Measure the speed and direction of movement, perfect for fitness and motion-based applications. - **Magnetometer**: Detect magnetic field strength and direction, useful for navigation and augmented reality. - **Altimeter/Pressure Sensor**: Access real-time altitude and pressure data, ideal for outdoor adventures. - **Attitude**: Understand device posture with detailed readings of roll, pitch, and yaw. Designed with both power users and beginners in mind, Sensor-App provides intuitive access to your device’s advanced hardware features. Take control of your sensor data and transform how you interact with the world around you. Whether for personal exploration, scientific research, or application development, Sensor-App is your gateway to a more insightful mobile experience.
HemiPhysioData
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.
- 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
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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
Screenshots
Verdict
The clearest difference is review sentiment: HemiPhysioData at 100% against Sensor's 56%. HemiPhysioData also leads on iOS requirement (13.2 vs 26.0). Sensor's advantage is update cadence (every 2 months vs every 18 months). On price, ads, in-app purchases and monetization model 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Sensor ships an update every 2 months, HemiPhysioData every 18 months. The most recent releases landed on September 10, 2026 and June 4, 2026 respectively.
| Parameter | Sensor | HemiPhysioData |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (4 ratings) — better | — |
| Positive reviews | 55.6% of reviews | 100.0% of reviews — better |
| Number of ratings | 4 — better | — |
| Update frequency | Every 2 months — better | Every 18 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPod, Apple Watch |
| Requires iOS | 26.0 | 13.2 — better |
| Further details — not scored | ||
| Size | 40 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Volker Schmitt | Moez ur Rehman |
Customer experience
Sensor
HemiPhysioData
In-app purchases
Sensor
No in-app purchases
HemiPhysioData
No in-app purchases









