Eye Handbook vs iTorsion
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Eye Handbook
A comprehensive eye care reference app for ophthalmologists, optometrists, and students. It offers diagnostic tools, treatment references, calculators, educational resources, and community forums to support eye care professionals.
- Diagnostic and treatment reference
- Eye calculators (visual acuity, diabetic retinopathy, etc.)
- Medication and pharmacopeia
- Ophthalmology and optometry journals
- Patient education tools
- Peer-to-peer forums
- Eye atlas and diagrams
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Eye Handbook (EHB) is an eye care reference book and an all-in-one app for Ophthalmologists, Optometrists as well as Students/Residents pursuing the field of eye care. The Eye Handbook is a smartphone diagnostic and treatment reference app for Ophthalmologists and Optometrists. Below is a list of some of the common features. -Eye Calculators -Transposition Calculator -Visual Acuity Calculator -Age to bifocal -Diabetic Retinopathy Severity Calculator -Dry Eye Disease Calculator -Glaucoma Risk Calculator -Thyroid Eye Disease Calculator -Retinoblastoma Calculator -EHB Indirect Camera -Ocular Trauma Score -Plaquenil Dosing -IOP-CCT -Pupillary Distance -DDX -Testing -ICD9 coding -ICD9 to ICD10 converter -ICD10 coding -Audio, Video downloads -Directory -Eye Atlas -Eye Wiki -Peer-to-peer Forums -Connecting with patients -Ophthalmology and Optometry Journals -Medication and Pharmacopeia -Journals -Eye Diagrams -Patient Education tools -RSS Feeds -Acronym List -Dictionary -Eponyms -Genetics -Mnemonics -Workups -Treatment Reference -Vision Symptoms Cards If you have content that you would like to contribute; please contact us at eyehandbook@gmail.com. Please feel free to contact us with any questions you may have. We are constantly striving to improve this application and welcome your feedback. www.eyehandbook.com The Eye Handbook Team
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.
- Ocular torsion diagnosis
- Smartphone-based testing
- Red/green glasses compatibility
- Precise measurement
- Extorsion and intorsion calculation
- Customizable color values
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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
Verdict
The clearest difference is ads: iTorsion at none against Eye Handbook's shown. iTorsion also leads on review sentiment (100% vs 82%) and monetization model (free vs ad-supported). Eye Handbook's advantage is ratings volume (1.2K vs 6) and update cadence (every 3 weeks vs every 3 months). On price, rating, in-app purchases and device support 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.
iTorsion holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Eye Handbook has 1.2K ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 82% of Eye Handbook's written reviews are positive against 100% of iTorsion's.
Eye Handbook ships an update every 3 weeks, iTorsion every 3 months. The most recent releases landed on November 1, 2026 and October 12, 2026 respectively.
| Parameter | Eye Handbook | iTorsion |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (1.2K ratings) | 5.0 (6 ratings) — better |
| Positive reviews | 82.2% of reviews | 100.0% of reviews — better |
| Number of ratings | 1.2K — better | 6 |
| Update frequency | Every 3 weeks — better | Every 3 months |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 10.3 — better |
| Further details — not scored | ||
| Size | 480 MB | 17 MB |
| Age rating | 17+ | 17+ |
| Developer | Cloud Nine Development LLC | Regents of the University of Minnesota |
Customer experience
Eye Handbook
iTorsion
Bugs and requests
Eye Handbook
Reported bugs
3 issues- Registration process issues
- Compatibility problems with newer iOS versions
- Incorrect medication information
Requested features
4 requests- Add Tumbling E and Landolt C charts
- Improve search functionality
- Provide a paid ad-free version
- Optimize for larger screens (iPad)
iTorsion
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Eye Handbook
No in-app purchases
iTorsion
No in-app purchases
Questions
Is Eye Handbook free?
Is iTorsion free?
Which has better reviews, Eye Handbook or iTorsion?
Do Eye Handbook or iTorsion have ads?
Which is updated more often, Eye Handbook or iTorsion?
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