Comparison

Visual Vertical Lite vs Lazy Eye VisionSimul

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

Head to head
About

Visual Vertical Lite

This medical app offers a quick, accurate, and affordable method for measuring subjective visual vertical in patients. It simplifies a previously complex and expensive diagnostic process, making it accessible for neurologists and vestibular rehabilitation specialists.

Highlights
  • Measures subjective visual vertical
  • Accurate and low-cost readings
  • Uses iPhone/iPad for testing
  • Suitable for neurology and vestibular rehab
  • Tests otolithic function
  • Single readings for each eye
Features
Read full description

Visual Vertical Lite makes subjective visual vertical (SVV) testing simple and accessible using equipment you already have. Traditional SVV testing can require specialised equipment and a controlled visual environment. Visual Vertical Lite provides a practical alternative using your iPhone, a bucket and a small piece of Blu Tack. HOW IT WORKS Mount your iPhone inside the bottom of a bucket using Blu Tack. The person being tested holds the bucket to their face and adjusts the line on screen until it appears vertical. Visual Vertical Lite measures the resulting deviation from true vertical and displays the result in degrees. TEST THE WAY YOU NEED Choose from: • Left eye • Right eye • Both eyes open Visual Vertical Lite is designed for quick, individual measurements, making it ideal when you simply need to perform a one-off SVV test. SIMPLE RESULTS Results are presented immediately in a clean, easy-to-read format, including the measured deviation and direction. BUILT-IN GUIDANCE Not familiar with the bucket method? The included guide walks you through equipment setup, positioning, testing and interpretation of the results. LITE OR FULL? Visual Vertical Lite includes the core functionality required to perform individual SVV tests. For sequential testing, multiple readings and automatic averaging across test conditions, choose the full Visual Vertical app. UPDATED FOR MODERN iOS Visual Vertical Lite has been comprehensively updated with a redesigned interface, clearer navigation and support for current versions of iOS.

About

Lazy Eye VisionSimul

This app simulates visual system disorders, specifically lazy eye, to help users understand the condition. It's designed to support eye wellness and visual skills development. Always consult a doctor for medical advice.

Highlights
  • Visual system disorder simulation
  • Eye wellness support
  • Visual skills development
  • Educational tool for lazy eye
Features
Currently charting
Read full description

Lazy Eye is a visual system disorder where vision is diminished or lacking in an eye that otherwise appears physically normal. It often develops in early childhood and typically affects one eye, though both eyes can be impacted in some cases. Detecting this imbalance in vision early in life can increase the likelihood of improved visual function. Vision Simul: Eye Wellness and Visual Skills Support Disclaimer reminding: Our apps maybe not suit all people. So please seek your doctor’s advice in addition to using our app and before making any medical decisions.

Screenshots

Visual Vertical Lite4 screens
Lazy Eye VisionSimul4 screens

Verdict

The call

The clearest difference is update cadence: Lazy Eye VisionSimul at every 3 months against Visual Vertical Lite's every 42 months. Lazy Eye VisionSimul also leads on price ($2.99 vs $5.99) and chart position (#195 vs unranked). On 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

CostPrice · In-app purchases · Ads · Monetization

Visual Vertical Lite costs $5.99 and Lazy Eye VisionSimul $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Visual Vertical Lite ships an update every 42 months, Lazy Eye VisionSimul every 3 months. The most recent releases landed on September 24, 2026 and September 21, 2026 respectively.

Scorecard5 real differences · 6 level
Visual Vertical Lite versus Lazy Eye VisionSimul: the parameters behind the verdict, then further details
ParameterVisual Vertical LiteLazy Eye VisionSimul
Price$5.99$2.99 — better
Rating2.0 (1 ratings) — better
Positive reviews0.0% of reviews
Number of ratings1 — better
Update frequencyEvery 42 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank#195 — better
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.013.0 — better
Further details — not scored
Size6 MB119 MB
Age rating4+4+
DeveloperClear Health Media俊华 罗

Customer experience

Visual Vertical Lite

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

Lazy Eye VisionSimul

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Visual Vertical Lite

No in-app purchases

None

Lazy Eye VisionSimul

No in-app purchases

Questions

Is Visual Vertical Lite free?
Visual Vertical Lite costs $5.99, with no in-app purchases.
Is Lazy Eye VisionSimul free?
Lazy Eye VisionSimul costs $2.99, with no in-app purchases.
Do Visual Vertical Lite or Lazy Eye VisionSimul have ads?
Neither Visual Vertical Lite nor Lazy Eye VisionSimul shows ads.
Which is updated more often, Visual Vertical Lite or Lazy Eye VisionSimul?
Visual Vertical Lite ships an update every 42 months, and Lazy Eye VisionSimul every 3 months. Most recently, Visual Vertical Lite was updated on September 24, 2026 and Lazy Eye VisionSimul on September 21, 2026.

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