Comparison

HemiPhysioData vs Watch Sensor Logger

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

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.

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
Read full description

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 β€˜Starts In’ time and the logging β€˜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

About

Watch Sensor Logger

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
Read full description

Watch Sensor Logger turns your Apple Watch into a powerful motion and location logger. Record high-precision sensor data straight from your wrist: β€’ Acceleration β€’ Rotation Rate β€’ Gravity β€’ Attitude β€’ GPS location Start a recording on your Apple Watch, then review your sessions on your iPhone. Every measurement is visualized with clear charts so you can spot patterns at a glance, and you can export any session as a CSV file for analysis in your favorite tools. Perfect for researchers, developers, athletes, and anyone curious about the motion of everyday life. KEY FEATURES β€’ One-tap recording on Apple Watch β€’ Motion sensors: acceleration, rotation rate, gravity, attitude β€’ GPS location logging β€’ Beautiful charts to explore your data β€’ CSV export for spreadsheets and analysis β€’ Manage and delete past sessions easily

Screenshots

HemiPhysioData3 screens
Watch Sensor Logger4 screens

Verdict

The call

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.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

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

UpkeepUpdate frequency

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.

Scorecard3 real differences Β· 5 level
HemiPhysioData versus Watch Sensor Logger: the parameters behind the verdict, then further details
ParameterHemiPhysioDataWatch Sensor Logger
PriceFreeFree
Positive reviews100.0% of reviews β€” better50.0% of reviews
Update frequencyEvery 18 months β€” betterEvery 25 months
AdsNo β€” betterYes
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPod, Apple WatchiPhone, iPad, Apple Watch
Requires iOS13.2 β€” better17.0
Further details β€” not scored
Size2 MB17 MB
Age rating4+4+
DeveloperMoez ur Rehmanyuya kanbetsunawa

Customer experience

HemiPhysioData

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Watch Sensor Logger

Written reviews2 reviews
Positive50.0%
Neutral50.0%
Negative0.0%

In-app purchases

None

HemiPhysioData

No in-app purchases

None

Watch Sensor Logger

No in-app purchases

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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