iTorsion vs Ophthalmology & Optometry
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
Ophthalmology & Optometry
This app transforms your iPhone into a comprehensive digital call bag for healthcare professionals. It offers a wide array of specialized tools for ophthalmology, neurology, optometry, emergency medicine, and internal medicine, leveraging advanced iPhone camera and sensor technology.
- Ophthalmology diagnostic tools
- Neurology screening tools
- Optometry vision tests
- Emergency medicine aids
- Internal medicine calculators
- LiDAR exophthalmometer
- AI Lensometer
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Designed for healthcare professionals, this app transforms your iPhone into a comprehensive digital call bag, utilizing the True Depth Camera, gyroscope, and accelerometer. Ophthalmology Tools • Distance vision chart with Apple Watch remote • LiDAR exophthalmometer • AI Lensometer • Topography with Placido Disc • Visual field tool with automated perimetry • Refraction Tool for Rough Bedside Refraction • Pediatric, Tumbling E, and Landolt C optotypes • Ullman Indirect' for fundus photography • Astigmatism Dial stabilized with gyroscope mode • Ishihara, Cambridge, and Pediatric color tests • Axis Finder for toric IOL marking • Strabismus selfie tool • IOL spec sheets • Cornea and retina drawing tools • Slit lamp photography tool • Eye Disease Simulator • Hirschberg strabismus tool • Ptosis MRD measurement tool • IOL simulator • DMEK & Capsulorhexis simulator • 3D Model of eye & orbit Neurology Tools • Vestibular Ocular Motor Screening • Penlight tool with video recording • OKN Drum with adjustable stripes • Near card calibrated with True Depth Camera • Subjective Visual Vertical (SVV) • Dermatome Map • Tuning Fork • NIH Stroke Scale • Navon Figures • Clock Drawing Test • Spiral Drawing Test Optometry Tools • Pupillary distance measurement • Crowding bars in single optotype mode • Amsler Grids with scotoma drawing and recording • Duochrome Test for refractive error assessment • Contrast Sensitivity Chart • Worth 4 Dot Test with pediatric targets • Anisometropia tool • Near point of accommodation measurement using True Depth Camera Emergency Medicine Tools • Vein finder tool • Cobalt Blue Light for corneal abrasion checks • Pupil gauge for measuring pupil size • Goniometer for joint range of motion measurement • Ophthalmic instrument spec sheets Internal Medicine Tools • Measure heart rate with camera • Calculators: - Calcium Correction for Hypoalbuminemia - CHADS-VASC Score for Atrial Fibrillation Stroke Risk - CKD-EPI Equations for Glomerular Filtration Rate (GFR)Mean Arterial Pressure (MAP) - Cockcroft-Gault Calculator - Creatinine Clearance - IOP corrected by pachymetry - Bifocal/Near Add Calculator - Amplitude of Accommodation Calculator - Thyroid Eye Disease (TED) Clinical Activity Score (CAS) Calculator - Spaeth Angle Grading Calculator - Scheie Angle Grading Calculator - Shaffer Grading Calculator - Parks-Bielschowsky 3 Step Test - Vertex Distance Calculator - Percent Tissue Altered LASIK Ectasia Risk Calculator - Randleman Post-LASIK Ectasia Risk Calculator - Body Mass Index (BMI) Calculator - Ocular Trauma Score Calculator - OHTS Glaucoma Calculator - Martin's Tilt Formula Calculator - Reese-Ellsworth Retinoblastoma Classification System - Munnerlyn Formula Calculator (Ablation Depth Calculator) - IOL Bag vs Sulcus Power Calculator - Glasgow Coma Scale (GCS) Calculator - Pediatric Glasgow Coma Scale Calculator - Wells' Criteria for DVT Calculator - Maintenance Fluids Calculator - Corrected QT Interval (QTc) Calculator - Wells' Criteria for PE - Intracerebral Hemorrhage (ICH) Score Calculator - Intracerebral Hemorrhage (ICH) Score Calculator - Steroid Conversion Calculator ...and many more! Customize Your Call Bag • Select favorite tools • Presets for various subspecialties • Metric and imperial system mode No invasive advertisements! No data collection! *Formerly called the "Eye Chart App" Disclaimer: This app is intended as an educational tool for healthcare professionals and should not replace traditional methods. It is not for self-diagnosis or treatment without professional guidance. This app is NOT intended for diagnosis, cure, mitigation, treatment, or prevention of disease, nor to affect the structure or any function of the body.* *iPad "Eye Chart" app now available separately that can test distance vision, this app can be run on the iPad but is not specifically formatted for iPad screens** Terms of Service: http://MyCallBag.com/terms.html
Screenshots
Verdict
The clearest difference is review sentiment: iTorsion at 100% against Ophthalmology & Optometry's 62%. iTorsion also leads on in-app purchases (none vs 8) and rating (5.0 vs 4.7). Ophthalmology & Optometry's advantage is update cadence (every 4 days vs every 3 months) and ratings volume (120 vs 6). On price, ads 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. Ophthalmology & Optometry sells 8 in-app purchases, starting at $9.99 per month. iTorsion asks for nothing beyond the download.
iTorsion holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Ophthalmology & Optometry has 120 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 100% of iTorsion's written reviews are positive against 62% of Ophthalmology & Optometry's.
iTorsion ships an update every 3 months, Ophthalmology & Optometry every 4 days. The most recent releases landed on November 2, 2026 and November 8, 2026 respectively.
| Parameter | iTorsion | Ophthalmology & Optometry |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (6 ratings) — better | 4.7 (120 ratings) |
| Positive reviews | 100.0% of reviews — better | 61.8% of reviews |
| Number of ratings | 6 | 120 — better |
| Update frequency | Every 3 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 10.3 — better | 17.1 |
| Further details — not scored | ||
| Size | 17 MB | 250 MB |
| Age rating | 17+ | 4+ |
| Developer | Regents of the University of Minnesota | My Call Bag LLC |
Customer experience
iTorsion
Ophthalmology & Optometry
In-app purchases
iTorsion
No in-app purchases
Ophthalmology & Optometry
- iPad Monthly Subscription3 Days trial$9.991 Month
- Monthly Subscription3 Days trial$14.991 Month
- Annual Subscription3 Days trial$49.991 Year
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- Annual Subscription to iPad App3 Days trial$49.991 Year
- 100 Credits$3.99
- 500 Credits$19.99
- Lifetime Access to iPad App$149.99
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- My Call Bag$249.99
Questions
Is iTorsion free?
Is Ophthalmology & Optometry free?
Which has better reviews, iTorsion or Ophthalmology & Optometry?
Do iTorsion or Ophthalmology & Optometry have ads?
Which is updated more often, iTorsion or Ophthalmology & Optometry?
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