# 9 Gaze vs Persyst Mobile

The clearest difference is rating: Persyst Mobile at 5.0 against 9 Gaze's 4.6. 9 Gaze's advantage is ratings volume (22 vs 3) and iOS requirement (13.0 vs 15.0). 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.

Persyst Mobile holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: 9 Gaze has 22 ratings behind it against 3, so its average is the more settled of the two.

9 Gaze ships an update every 2 months, Persyst Mobile every 3 months. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | 9 Gaze | Persyst Mobile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (22 ratings)](https://appshunter.io/ios/app/9-gaze/id1173442389/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/persyst-mobile/id1177132835/reviews)** |
| Number of ratings | **22** | 3 |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free | Free |
| Size | 36 MB | 44 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [See Vision, LLC](https://appshunter.io/developer/1173442388) | [PERSYST DEVELOPMENT LLC](https://appshunter.io/developer/1177132834) |

## What reviewers say

### 9 Gaze

[App page](https://appshunter.io/ios/app/9-gaze/id1173442389)

This app helps document eye motility and strabismus in nine cardinal positions. It offers an on-screen guide for consistent eye positioning and automatically creates composite images for easy exporting. Users can add strabismus measurements and email or save images for medical records.

**Highlights:** Document eye motility and strabismus, On-screen guide for eye positioning, Automatic composite image creation, Add strabismus measurements, Selfie or standard mode, Email or save images

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

**In-app purchases:** none


### Persyst Mobile

[App page](https://appshunter.io/ios/app/persyst-mobile/id1177132835)

This medical application assists neurologists in monitoring and reviewing EEG data. It functions as a component of a broader system offered by Persyst, designed for professional use in healthcare settings.

**Highlights:** EEG monitoring, EEG review, Part of a larger system, Professional medical tool, Neurologist focused

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

**In-app purchases:** none


## Frequently asked questions

### Is 9 Gaze free?

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

### Is Persyst Mobile free?

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

### Which has better reviews, 9 Gaze or Persyst Mobile?

Persyst Mobile is rated higher. 9 Gaze averages 4.6 out of 5 from 22 ratings, while Persyst Mobile averages 5.0 from 3 ratings.

### Do 9 Gaze or Persyst Mobile have ads?

Neither 9 Gaze nor Persyst Mobile shows ads.

### Which is updated more often, 9 Gaze or Persyst Mobile?

9 Gaze ships an update every 2 months, and Persyst Mobile every 3 months. Most recently, 9 Gaze was updated on October 24, 2026 and Persyst Mobile on October 29, 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.*