# Motion Log Plus vs ETPhone

The clearest difference is price: ETPhone at Free against Motion Log Plus's $2.99. ETPhone also leads on rating (3.0 vs 1.0) and ratings volume (6 vs 1). Motion Log Plus's advantage is iOS requirement (13.1 vs 16). On update cadence, ads, in-app purchases and device support there is nothing between them.

ETPhone is free to download; Motion Log Plus costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ETPhone holds the better App Store score, 3.0 against 1.0. That said, the two scores are not equally well evidenced: ETPhone has 6 ratings behind it against 1, so its average is the more settled of the two.

Motion Log Plus ships an update every 22 months, ETPhone every 16 months. The most recent releases landed on October 5, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Motion Log Plus | ETPhone |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/motion-log-plus/id1487352498/reviews) | **[3.0 (6 ratings)](https://appshunter.io/ios/app/etphone/id1529643726/reviews)** |
| Number of ratings | 1 | **6** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 22 months | **Every 16 months** |
| Monetization | Paid | **Free** |
| Size | 2 MB | 1 MB |
| Requires iOS | **13.1** | 16 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Heng Jia Liang](https://appshunter.io/developer/1532000635) | [Argus Science, LLC](https://appshunter.io/developer/1529643728) |

## What reviewers say

### Motion Log Plus

[App page](https://appshunter.io/ios/app/motion-log-plus/id1487352498)

This tool captures and visualizes motion data from your iOS device, including orientation, attitude, and acceleration. You can preview recordings in 3D and export log files for further analysis.

**Highlights:** Capture device orientation, attitude, and acceleration, Preview motion data in 3D, Rename and delete log files, Export motion log files, Turn off screen while recording

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### ETPhone

[App page](https://appshunter.io/ios/app/etphone/id1529643726)

This application enables real-time gaze computation and recording for eye tracking data collection using a compatible wearable device. It offers control over camera settings, participant calibration, and data recording to an SD card. Collected data can be easily transferred for detailed analysis on a PC.

**Highlights:** Real-time gaze computation, Gaze data recording, Camera gain and quality control, Participant calibration, SD card recording control, Data download for PC analysis

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Motion Log Plus free?

Motion Log Plus costs $2.99, with no in-app purchases.

### Is ETPhone free?

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

### Which has better reviews, Motion Log Plus or ETPhone?

ETPhone is rated higher. Motion Log Plus averages 1.0 out of 5 from 1 ratings, while ETPhone averages 3.0 from 6 ratings.

### Do Motion Log Plus or ETPhone have ads?

Neither Motion Log Plus nor ETPhone shows ads.

### Which is updated more often, Motion Log Plus or ETPhone?

Motion Log Plus ships an update every 22 months, and ETPhone every 16 months. Most recently, Motion Log Plus was updated on October 5, 2026 and ETPhone on October 10, 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.*