# Device Motion Detective vs G

The clearest difference is review sentiment: G at 50% against Device Motion Detective's 0%. G also leads on rating (3.7 vs 1.0) and update cadence (every 4 days vs every 13 months). Device Motion Detective's advantage is in-app purchases (none vs 2) and iOS requirement (12.0 vs 14.7). On price, ads and device support there is nothing between them.

Both are free to download. G sells 2 one-off in-app purchases. Device Motion Detective asks for nothing beyond the download.

G holds the better App Store score, 3.7 against 1.0. That said, the two scores are not equally well evidenced: G has 9 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of Device Motion Detective's written reviews are positive against 50% of G's.

Device Motion Detective ships an update every 13 months, G every 4 days. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Device Motion Detective | G |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/device-motion-detective/id884501447/reviews) | **[3.7 (9 ratings)](https://appshunter.io/ios/app/g-field-recorder/id1154585693/reviews)** |
| Number of ratings | 1 | **9** |
| Positive reviews | 0.0% of reviews | **50.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 4 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 2 MB | 35 MB |
| Requires iOS | **12.0** | 14.7 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [方 沈](https://appshunter.io/developer/882296318) | [Stratos Perception, LLC](https://appshunter.io/developer/721934057) |

## 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


### G

[App page](https://appshunter.io/ios/app/g-field-recorder/id1154585693)

This app records and analyzes motion data from your device's sensors, including acceleration, rotation, and GPS information. It's designed for experiments, performance analysis, and tracking various movements. Data can be exported in CSV format and is resistant to loss.

**Highlights:** Logs and plots motion data (acceleration, rotation), Records ground speed, altitude, distance, and displacement, Virtually unlimited recording time, Programmable data acquisition control, Remote control via Apple Watch, Configurable acceleration reference frame, Export data in CSV format

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Multi-Plot | $0.99 | one-time |
| Professional | $3.99 | one-time |


## Frequently asked questions

### Is Device Motion Detective free?

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

### Is G free?

G is free to download, with in-app purchases available.

### Which has better reviews, Device Motion Detective or G?

G is rated higher. Device Motion Detective averages 1.0 out of 5 from 1 ratings, while G averages 3.7 from 9 ratings.

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

Neither Device Motion Detective nor G shows ads.

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

Device Motion Detective ships an update every 13 months, and G every 4 days. Most recently, Device Motion Detective was updated on November 1, 2026 and G on November 2, 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.*