Comparison

NTK Portal vs ViSymulation Pro

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

Head to head
About

NTK Portal

Features
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The “NTK Academic Group” mobile application is now available for NTK’s parents & students! With this app, you can easily check your lesson schedule, exam dates, special offers, etc. With the app, you can: - View upcoming lessons and exam dates - Check outstanding tuition fees and settle payment conveniently - Contact our Education Services Officers with a few simple taps - Receive information about NTK news, events and offers About NTK Established in 1996, NTK Learning Center is a leading educational service provider in Southeast Asia. NTK specializes in academic tuition for students following international curricula, standardized test preparation, and educational planning and consultation services.

About

ViSymulation Pro

Features
Read full description

"ViSymulation Pro" is an augmented reality (AR) mobile application, developed by the Department of Ophthalmology, School of Clinical Medicine of the University of Hong Kong. It aims to educate users on the visual symptoms of common vision problems. Users could gain a first-person experience of the impaired vision and the corresponding difficulties encountered by the visually impaired persons (VIPs). As a result, the public awareness of vision protection is raised while the empathetic attitude towards the visually-impaired people are developed among the community. "ViSymulation Pro" provides 2 modes: 1. "Information About Vision Problems" - For individual users - Discover the aetiology, signs and visual symptoms of vision problems - Experience visual symptoms of vision problems through the 1-minute AR simulation 2. "Create/Join Room" - For groups and events - Remote-control function: control of multiple smartphones to display desired visual symptoms to realize group-based teaching This mobile app can simulate the following vision problems with three stages of progression (mild, moderate, and severe) or the subtypes: - Diabetic Retinopathy - Cataract - Glaucoma - Age-related macular degeneration - Retinitis Pigmentosa - Retinal Detachment - Myopia - Hyperopia - Presbyopia - Astigmatism - Color Blindness (Protanopia, Tritanopia, Deuteranopia, Monochromacy) - Visual Pathway Lesions (Left Homonymous Hemianopia, Left Homonymous Superior Quadrantanopia, Left Homonymous Inferior Quadrantanopia)

Screenshots

NTK Portal4 screens
ViSymulation Pro4 screens

Verdict

The call

The clearest difference is update cadence: ViSymulation Pro at every 3 weeks against NTK Portal's every 5 weeks. On price, 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

NTK Portal ships an update every 5 weeks, ViSymulation Pro every 3 weeks. The most recent releases landed on October 26, 2026 and November 4, 2026 respectively.

Scorecard1 real difference · 5 level
NTK Portal versus ViSymulation Pro: the parameters behind the verdict, then further details
ParameterNTK PortalViSymulation Pro
PriceFreeFree
Update frequencyEvery 5 weeksEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.0 — better13.0
Further details — not scored
Size13 MB240 MB
Age rating4+12+
DeveloperNTK Academic GroupHKU TELI

In-app purchases

None

NTK Portal

No in-app purchases

None

ViSymulation Pro

No in-app purchases

Questions

Is NTK Portal free?
NTK Portal is free to download, with no in-app purchases.
Is ViSymulation Pro free?
ViSymulation Pro is free to download, with no in-app purchases.
Do NTK Portal or ViSymulation Pro have ads?
Neither NTK Portal nor ViSymulation Pro shows ads.
Which is updated more often, NTK Portal or ViSymulation Pro?
NTK Portal ships an update every 5 weeks, and ViSymulation Pro every 3 weeks. Most recently, NTK Portal was updated on October 26, 2026 and ViSymulation Pro on November 4, 2026.

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