# ETPhone vs Image Saliency

The clearest difference is ads: ETPhone at none against Image Saliency's shown. ETPhone also leads on device support (3 vs 1). Image Saliency's advantage is update cadence (fortnightly vs every 16 months). On price, in-app purchases and iOS requirement there is nothing between them.

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

ETPhone ships an update every 16 months, Image Saliency fortnightly. The most recent releases landed on September 8, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | ETPhone | Image Saliency |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (6 ratings)](https://appshunter.io/ios/app/etphone/id1529643726/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 16 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 1 MB | 38 MB |
| Requires iOS | **16** | 17.7.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Argus Science, LLC](https://appshunter.io/developer/1529643728) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### 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


### Image Saliency

[App page](https://appshunter.io/ios/app/image-saliency/id6511211544)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ETPhone free?

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

### Is Image Saliency free?

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

### Do ETPhone or Image Saliency have ads?

Image Saliency shows ads; ETPhone does not.

### Which is updated more often, ETPhone or Image Saliency?

ETPhone ships an update every 16 months, and Image Saliency fortnightly. Most recently, ETPhone was updated on September 8, 2026 and Image Saliency on September 11, 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.*