# Device Motion Detective vs HemiPhysioData

The clearest difference is review sentiment: HemiPhysioData at 100% against Device Motion Detective's 0%. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Device Motion Detective ships an update every 13 months, HemiPhysioData every 18 months. The most recent releases landed on September 20, 2026 and June 4, 2026 respectively.

## The numbers

| Metric | Device Motion Detective | HemiPhysioData |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/device-motion-detective/id884501447/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 13 months** | Every 18 months |
| Monetization | Free | Free |
| Size | 2 MB | 2 MB |
| Requires iOS | **12.0** | 13.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [方 沈](https://appshunter.io/developer/882296318) | [Moez ur Rehman](https://appshunter.io/developer/1502416676) |

## What reviewers say

### Device Motion Detective

[App page](https://appshunter.io/ios/app/device-motion-detective/id884501447)

This utility app captures and stores detailed device motion data, including accelerometer, gyroscope, and magnetometer readings. Users can view real-time motion graphs or past records saved to the database. Data is recorded every second for up to 20 minutes per session.

**Highlights:** Raw accelerometer data recording, Raw gyroscope data recording, Raw magnetometer data recording, Processed device-motion data, Real-time motion graphs, Past motion record viewing, Data saved to database

**Features:** Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Device Motion Detective free?

Device Motion Detective is free to download, with no in-app purchases.

### Is HemiPhysioData free?

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

### Do Device Motion Detective or HemiPhysioData have ads?

Neither Device Motion Detective nor HemiPhysioData shows ads.

### Which is updated more often, Device Motion Detective or HemiPhysioData?

Device Motion Detective ships an update every 13 months, and HemiPhysioData every 18 months. Most recently, Device Motion Detective was updated on September 20, 2026 and HemiPhysioData on June 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.*