9 Gaze vs DoseChecker
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.
DoseChecker
This app assists healthcare providers in calculating safe hydroxychloroquine dosages for patients. It follows American Academy of Ophthalmology guidelines and offers an adjustable weekly dosing schedule to maximize therapeutic benefit while avoiding toxic levels. The tool is designed for quick and efficient use by physicians and other healthcare professionals.
- Safe dosing regimen development
- Actual Body Weight method
- American Academy of Ophthalmology 2016 guidelines
- Adjustable weekly dosing schedule
- Calculates maximum therapeutic dose
- Simple weight entry and calculation
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DoseChecker is the first and only app that helps clinicians develop a safe dosing regimen for hydroxychloroquine. Tested and approved by physicians from the Harvard-affiliated hospitals Massachusetts Eye and Ear Infirmary and Massachusetts General Hospital, this app is intended for use by physicians and other health care providers who prescribe hydroxychloroquine to their patients or who monitor the ocular effects of this medication on their patients. 1. The app uses the Actual Body Weight method, following American Academy of Ophthalmology 2016 guidelines. 2. The app uses an adjustable weekly dosing schedule. Instead of placing the patient on either 400 mg per day or 200 mg per day (the drug comes only as a 200 mg tablet), the app suggests a weekly dosing regimen using a combination of 400 mg and 200 mg daily doses. This dosing regimen will yield the highest therapeutic dose attainable without exceeding the toxic limit defined by the Actual Body Weight method. The DoseChecker app is simple to use. The clinician just enters the patient’s weight in pounds or kilograms and touches the calculate button. The recommended weekly dosing appears immediately. In addition, the dosing recommendations always fall within the approved drug labeling (which also obviates the need for FDA mobile medical app registration). Thus, all physicians can use the app to rapidly and efficiently determine the safest dose of hydroxychloroquine--the most important step in preventing irreversible vision loss from hydroxychloroquine retinopathy. How to use DoseChecker: 1. Download from the App Store and install in your iPhone. (If the top letters in the app are not “DoseChecker” in large white text, then rotate the phone 90 degrees (horizontal position) and then back to vertical. The title should appear. 2. If you want to use the metric system for patient data entry, tap the Disclaimer/Change to Metric button. Then tap Metric button. Phone will stay in metric mode unless the power is turned off. 3. Blinking cursor is at left of Weight entry text box. Enter the patient’s weight in pounds or kg. Tap “return” 4. Blinking cursor is to the right of the default entry for patient’s current Dose (400 mg). If this correct, just tap “return”. The only time you would change the entry is if the patient was on 200 mg daily; then you would replace the 400 with 200 and tap “return”. 5. Once you have entered the data in the textboxes, you can go back as needed if there are errors. Once you are satisfied the entries are correct, tap the CALCULATE button. 6. Tap “RESET” to do another patient. NOTES: • To start a patient out on hydroxychloroquine, leave the default dose at 400 mg. Then you can see what the maximum dosing should be for that patient. • A weekly Dosing Schedule is recommended to allow the highest possible therapeutic level without exceeding the toxic dosing level. The Dosing Schedule always puts the lower doses (200 mg) at the end of the week. Thus it might recommend 400 mg daily Monday through Friday, and then 200 mg Saturday and Sunday. Of course, you could set the 2 lower days any time during the week for convenience (eg Monday and Thursday, if the patient finds that easier to remember).
Screenshots
Verdict
The clearest difference is review sentiment: 9 Gaze at 86% against DoseChecker's 33%. 9 Gaze also leads on rating (4.6 vs 4.0) and update cadence (every 2 months vs every 5 months). DoseChecker's advantage is iOS requirement (8.0 vs 13.0). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.
9 Gaze holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: 9 Gaze has 22 ratings behind it against 4, 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 33% of DoseChecker's.
9 Gaze ships an update every 2 months, DoseChecker every 5 months. The most recent releases landed on October 12, 2026 and October 7, 2026 respectively.
| Parameter | 9 Gaze | DoseChecker |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (22 ratings) — better | 4.0 (4 ratings) |
| Positive reviews | 85.7% of reviews — better | 33.3% of reviews |
| Number of ratings | 22 — better | 4 |
| Update frequency | Every 2 months — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 | 8.0 — better |
| Further details — not scored | ||
| Size | 36 MB | 100 MB |
| Age rating | 12+ | 17+ |
| Developer | See Vision, LLC | Massachusetts Eye and Ear Infirmary |
Customer experience
9 Gaze
DoseChecker
In-app purchases
9 Gaze
No in-app purchases
DoseChecker
No in-app purchases
Questions
Is 9 Gaze free?
Is DoseChecker free?
Which has better reviews, 9 Gaze or DoseChecker?
Do 9 Gaze or DoseChecker have ads?
Which is updated more often, 9 Gaze or DoseChecker?
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