Comparison

iTorsion vs IOL Reference

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
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.

About

IOL Reference

This ophthalmology utility helps surgeons find FDA-approved intraocular lenses. It features a searchable database of nearly 10,000 lenses, updated with new approvals and changes. The app also serves as a social media and networking platform for eye care professionals.

Highlights
  • Searchable IOL database
  • FDA-approved lens catalog
  • Database updates
  • Ophthalmology networking
  • Eye care tools
Features
Read full description

IOL Reference is a cross-platform ophthalmology utility, social media, and networking service that provides users with a wide array of eye care tools to optimize their outcomes. This unique app allows surgeons to quickly search for an FDA-approved, currently marketed intraocular lens (IOLs) that meets their needs and specifications. The database contains almost 10,000 individually cataloged lenses and will be updated to include newly FDA-approved IOLs, changes to current lenses, and corrections. This app was created by Gurpal Virdi, MD and Matt Hirabayashi, MD

Screenshots

iTorsion3 screens
IOL Reference4 screens

Verdict

The call

The clearest difference is update cadence: IOL Reference at weekly against iTorsion's every 3 months. iTorsion's advantage is rating (5.0 vs 4.7) and review sentiment (100% vs 89%). On price, ratings volume, 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 4.7. Both are backed by a comparable volume of ratings — 6 and 15 respectively. Written reviews point the same way: 100% of iTorsion's written reviews are positive against 89% of IOL Reference's.

UpkeepUpdate frequency

iTorsion ships an update every 3 months, IOL Reference weekly. The most recent releases landed on September 23, 2026 and July 5, 2026 respectively.

Scorecard4 real differences · 6 level
iTorsion versus IOL Reference: the parameters behind the verdict, then further details
ParameteriTorsionIOL Reference
PriceFreeFree
Rating5.0 (6 ratings) — better4.7 (15 ratings)
Positive reviews100.0% of reviews — better88.9% of reviews
Number of ratings615 — better
Update frequencyEvery 3 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.3 — better15.5
Further details — not scored
Size17 MB823 MB
Age rating17+4+
DeveloperRegents of the University of MinnesotaGurpal Virdi

Customer experience

iTorsion

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

IOL Reference

All ratings15 ratings
Positive93.3%
Neutral0.0%
Negative6.7%
Written reviews9 reviews
Positive88.9%
Neutral0.0%
Negative11.1%

In-app purchases

None

iTorsion

No in-app purchases

None

IOL Reference

No in-app purchases

Questions

Is iTorsion free?
iTorsion is free to download, with no in-app purchases.
Is IOL Reference free?
IOL Reference is free to download, with no in-app purchases.
Which has better reviews, iTorsion or IOL Reference?
iTorsion is rated higher. iTorsion averages 5.0 out of 5 from 6 ratings, while IOL Reference averages 4.7 from 15 ratings.
Do iTorsion or IOL Reference have ads?
Neither iTorsion nor IOL Reference shows ads.
Which is updated more often, iTorsion or IOL Reference?
iTorsion ships an update every 3 months, and IOL Reference weekly. Most recently, iTorsion was updated on September 23, 2026 and IOL Reference on July 5, 2026.

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