Comparison

9 Gaze vs Persyst Mobile

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

9 Gaze

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
Read full description

9 Gaze is an easy, quick, and efficient way to document eye motility and strabismus in the nine cardinal positions of gaze (and 2 head tilts, abnormal head position). The app provides an on-screen guide for eye positioning to assist with image consistency through all photographs. 9Gaze app automatically creates a composite image of the photographs for easy exporting. Designed for a touch-screen interface, you can also quickly add strabismus measurements to your photograph or as a stand-alone image. You can email the images to yourself for importing into your record or save to your camera roll. Features: - Selfie mode or standard mode - On-screen guide for placement of eyes (with autocrop) - Automatic creation of the composite image of all 9(+2) positions of gaze - Ability to skip gaze directions (or skip to end) - Re-take any picture - Turn flash on or off - Landscape and portrait modes - Ability to document name, ID number, date of birth, and date of picture Save time with 9 Gaze! Disclaimer: No information or photos are ever saved within the app. It is the user's responsibility to protect any and all protected health information (PHI) obtained by the user. If you choose to save images to camera roll, it is highly suggested to encrypt your phone and turn off iCloud photo backup. When emailing photos, please make sure your email is HIPAA secure. This is not a medical device. Do not use app to diagnose or treat any medical conditions.

About

Persyst Mobile

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
Read full description

This is an application intended to be used by neurologists who are monitoring or reviewing EEGs. It is part of a larger system provided by Persyst.

Screenshots

9 Gaze4 screens
Persyst Mobile1 screens

Verdict

The call

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). On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on August 27, 2026 and June 1, 2026 respectively.

Scorecard2 real differences · 8 level
9 Gaze versus Persyst Mobile: the parameters behind the verdict, then further details
Parameter9 GazePersyst Mobile
PriceFreeFree
Rating4.6 (22 ratings)5.0 (3 ratings) — better
Positive reviews85.7% of reviews—
Number of ratings22 — better3
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better14.0
Further details — not scored
Size36 MB44 MB
Age rating12+17+
DeveloperSee Vision, LLCPERSYST DEVELOPMENT LLC

Customer experience

9 Gaze

All ratings22 ratings
Positive90.9%
Neutral0.0%
Negative9.1%
Written reviews14 reviews
Positive85.7%
Neutral0.0%
Negative14.3%

Persyst Mobile

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

9 Gaze

No in-app purchases

None

Persyst Mobile

No in-app purchases

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 2 months. Most recently, 9 Gaze was updated on August 27, 2026 and Persyst Mobile on June 1, 2026.

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