Comparison

Glaucoma Calc vs Cataract Lens

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

Head to head
About

Glaucoma Calc

Estimate the 5-year risk of glaucoma development in patients with ocular hypertension. This tool simplifies data entry for multiple perimeters and offers quick calculations on Apple Watch.

Highlights
  • Glaucoma risk estimation
  • Ocular hypertension assessment
  • Supports Humphrey, Medmont, Octopus perimeters
  • Single-screen interface
  • Apple Watch app integration
  • Independent Apple Watch functionality
Features
Read full description

Glaucoma Calc can be used to estimate the risk of a patient with ocular hypertension developing glaucoma within 5 years. The ONLY calculator that lets you enter your field measurements YOUR way. Easy, single-screen interface, for fast decision-making in a busy practice. The original OHTS calculator is still the best. Now with easy entry for both eyes, reducing the workload on your brain. It uses the same calculation data as some other online calculators and electronic single-purpose calculators. However, being on your iPhone means you always have it available at all times. It also has the benefit of having full support for all three major perimeters: Humphrey, Medmont and Octopus. No manual conversion is required. And, being an iPhone application, its really simple to use, everything happens on just one screen, enter your five parameters (Age, IOP, C/D ratio, CCT and PSD/PD/LV) and the glaucoma risk is displayed. Now includes an Apple Watch app that lets you calculate your patients' glaucoma risk without leaving your wrist! The Apple Watch app works independently of the iPhone app, you don't even need your iPhone with you for the app to work. A Complication is included to give you quick access to the last calculated risk value, and to allow one-touch access to the app if you are using it regularly. Please remember that this application is purely an aid, and is not a replacement for clinical judgement.

About

Cataract Lens

Features
Read full description

Experience the pinnacle of precision with Cataract Lens – where state-of-the-art algorithms meticulously analyse patient responses to craft a truly individualised IOL recommendation. Empowering doctors with the ability to fine-tune weightings for specific lens types, this app ensures a tailored approach that aligns with each patient's unique needs. But it doesn't end there – collaboration is key! Doctors can contribute to the algorithm's refinement by submitting their final intraocular lens decisions. This symbiotic relationship between technology and medical expertise guarantees continuous improvement and ultimately results in more accurate and personalised recommendations for every patient. Choose Cataract Lens for a revolutionary way to guide your cataract surgery decisions, backed by cutting-edge algorithms and a collaborative doctor-patient journey. Your vision, your choice, perfected. Disclaimer: Please seek a doctor’s advice in addition to using this app and before making any medical decisions.

Screenshots

Glaucoma Calc2 screens
Cataract Lens4 screens

Verdict

The call

The clearest difference is price: Cataract Lens at Free against Glaucoma Calc's $2.99. Cataract Lens also leads on update cadence (every 2 months vs every 10 months) and iOS requirement (12.0 vs 17.0). On ads, 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

CostPrice · In-app purchases · Ads · Monetization

Cataract Lens is free to download; Glaucoma Calc costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Glaucoma Calc ships an update every 10 months, Cataract Lens every 2 months. The most recent releases landed on September 22, 2026 and September 11, 2026 respectively.

Scorecard3 real differences · 7 level
Glaucoma Calc versus Cataract Lens: the parameters behind the verdict, then further details
ParameterGlaucoma CalcCataract Lens
Price$2.99Free — better
Rating5.0 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 10 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS17.012.0 — better
Further details — not scored
Size7 MB46 MB
Age rating4+12+
DeveloperOptical Directions ConsultingChun-Huei Liu

In-app purchases

None

Glaucoma Calc

No in-app purchases

None

Cataract Lens

No in-app purchases

Questions

Is Glaucoma Calc free?
Glaucoma Calc costs $2.99, with no in-app purchases.
Is Cataract Lens free?
Cataract Lens is free to download, with no in-app purchases.
Do Glaucoma Calc or Cataract Lens have ads?
Neither Glaucoma Calc nor Cataract Lens shows ads.
Which is updated more often, Glaucoma Calc or Cataract Lens?
Glaucoma Calc ships an update every 10 months, and Cataract Lens every 2 months. Most recently, Glaucoma Calc was updated on September 22, 2026 and Cataract Lens on September 11, 2026.

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