Comparison

9 Gaze vs iTorsion

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

iTorsion

This medical app simplifies diagnosing ocular torsion using just a smartphone and red/green glasses. It offers greater precision than traditional methods, providing extorsion and intorsion measurements for each eye after a patient test.

Highlights
  • Ocular torsion diagnosis
  • Smartphone-based testing
  • Red/green glasses compatibility
  • Precise measurement
  • Extorsion and intorsion calculation
  • Customizable color values
Features
Read full description

iTorsion seeks to make the diagnosis of ocular torsion a simpler and easier process for both doctors and their patients. While traditional diagnostic methods require using special equipment (e.g., Double Maddox Rod) that often lacks precision, iTorsion only requires a smartphone and red/green glasses leading to much greater precision. This application is intended for use by doctors, and not for self-diagnosis by patients. Usage of the application will require standard red-green glasses to filter out colors from each eye. The specific color values can be tailored in the app to fit the specific requirements for the display and the glasses. The smartphone should be held on a level surface as the patient interacts with it. The patient should see predominantly one of the lines out of each eye, and will be asked to make the lines parallel with each other, as well as to the ground. After finishing the test, a screen will indicate the degree of extorsion and intorsion for each of the patient’s eyes.

Screenshots

9 Gaze4 screens
iTorsion3 screens

Verdict

The call

The clearest difference is rating: iTorsion at 5.0 against 9 Gaze's 4.6. iTorsion also leads on review sentiment (100% vs 86%) and iOS requirement (10.3 vs 13.0). 9 Gaze's advantage is ratings volume (22 vs 6). 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

iTorsion holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 22 and 6 respectively. Written reviews point the same way: 86% of 9 Gaze's written reviews are positive against 100% of iTorsion's.

UpkeepUpdate frequency

9 Gaze ships an update every 2 months, iTorsion every 3 months. The most recent releases landed on October 24, 2026 and October 12, 2026 respectively.

Scorecard4 real differences · 6 level
9 Gaze versus iTorsion: the parameters behind the verdict, then further details
Parameter9 GazeiTorsion
PriceFreeFree
Rating4.6 (22 ratings)5.0 (6 ratings) — better
Positive reviews85.7% of reviews100.0% of reviews — better
Number of ratings22 — better6
Update frequencyEvery 2 months — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.010.3 — better
Further details — not scored
Size36 MB17 MB
Age rating12+17+
DeveloperSee Vision, LLCRegents of the University of Minnesota

Customer experience

9 Gaze

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

iTorsion

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

9 Gaze

No in-app purchases

None

iTorsion

No in-app purchases

Questions

Is 9 Gaze free?
9 Gaze is free to download, with no in-app purchases.
Is iTorsion free?
iTorsion is free to download, with no in-app purchases.
Which has better reviews, 9 Gaze or iTorsion?
iTorsion is rated higher. 9 Gaze averages 4.6 out of 5 from 22 ratings, while iTorsion averages 5.0 from 6 ratings.
Do 9 Gaze or iTorsion have ads?
Neither 9 Gaze nor iTorsion shows ads.
Which is updated more often, 9 Gaze or iTorsion?
9 Gaze ships an update every 2 months, and iTorsion every 3 months. Most recently, 9 Gaze was updated on October 24, 2026 and iTorsion on October 12, 2026.

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