9 Gaze vs Opto
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
Opto
This application allows users to visually study the pupil and iris with enhanced clarity. It offers a patented method for determining pupil roundness through direct examination and two levels of quantification. Ideal for anyone interested in external eye study.
- Visualize pupil and iris
- Clearer eye view than naked eye
- Determine pupil roundness
- Patented quantification method
- External eye study tool
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Visual Intelligence, LLC, Opto-Screen is a unique App for visualizing the pupil and the iris. It can be used by anyone that is interested in studying a person’s eye externally. The Opto-Screen view of the pupil and the iris is much clearer than the naked eye. Opto-Screen also allows users to determine if the pupil is round by direct examination and through two levels of quantification with a Patented method.
Screenshots
Verdict
The clearest difference is rating: 9 Gaze at 4.6 against Opto's 3.0. 9 Gaze also leads on review sentiment (86% vs 50%) and in-app purchases (none vs 2). On price, ads, device support and iOS requirement 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
Both are free to download. Opto sells 2 in-app purchases, starting at $34.99 per month. 9 Gaze asks for nothing beyond the download.
9 Gaze holds the better App Store score, 4.6 against 3.0. That said, the two scores are not equally well evidenced: 9 Gaze has 22 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 86% of 9 Gaze's written reviews are positive against 50% of Opto's.
| Parameter | 9 Gaze | Opto |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (22 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 85.7% of reviews — better | 50.0% of reviews |
| Number of ratings | 22 — better | 2 |
| Update frequency | Every 2 months | — |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 | 12.1 — better |
| Further details — not scored | ||
| Size | 36 MB | 15 MB |
| Age rating | 12+ | 4+ |
| Developer | See Vision, LLC | Visual Intelligence, LLC |
Customer experience
9 Gaze
Opto
In-app purchases
9 Gaze
No in-app purchases
Opto
- Opto-Screen Monthly Access1 Month trial$34.991 Month
- Opto-Screen Annual Plan1 Month trial$349.991 Year









