Comparison

Clock Drawing Test vs Clock Drawing Test (CDT)

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

Head to head
About

Clock Drawing Test

Features
Read full description

The clock drawing test is a quick screening for the early detection of dementia. This app offers the possibility to perform the test automatically and have it analyzed digitally. Features: - Perform the popular clock drawing test for early dementia detection directly on iPad. - Draw with the Apple Pencil or simply with your finger - Get an instant, meaningful result, scored according to the scale by Shulman et. al. - Test regularly and stay mentally fit This app provides only information, is not medical or treatment advice and may not be treated as such by the user. As such, this app may not be relied upon for the purposes of medical diagnosis or as a recommendation for medical care or treatment. The information on this app is not a substitute for professional medical advice, diagnosis or treatment. All content, including text, graphics, images and information, contained on or available through this App is for general information purposes only. Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Clock Drawing Test (CDT)

Features
Read full description

The Clock Drawing Test is a simple tool used to screen for signs of early dementia, including Alzheimer’s disease. The Clock Drawing Test is often used in combination with other screening tests but can be valuable on its own. The early detection of dementia is important since medications exist which can help slow the progression of Alzheimer's disease. The Clock Drawing Test can provide a strong indication of early dementia but cannot diagnose dementia or the type of dementia. In addition to using this app, before making any medical decisions seek a doctor’s advice.

Screenshots

Clock Drawing Test (CDT)2 screens

Verdict

The call

The clearest difference is update cadence: Clock Drawing Test (CDT) at every 10 days against Clock Drawing Test's every 25 months. Clock Drawing Test (CDT) also leads on device support (3 vs 1) and iOS requirement (15.0 vs 18.0). On price, ads and in-app purchases there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

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

UpkeepUpdate frequency

Clock Drawing Test ships an update every 25 months, Clock Drawing Test (CDT) every 10 days. The most recent releases landed on September 30, 2026 and October 9, 2026 respectively.

Scorecard3 real differences Β· 3 level
Clock Drawing Test versus Clock Drawing Test (CDT): the parameters behind the verdict, then further details
ParameterClock Drawing TestClock Drawing Test (CDT)
PriceFreeFree
Update frequencyEvery 25 monthsEvery 10 days β€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPadiPhone, iPad, iPod β€” better
Requires iOS18.015.0 β€” better
Further details β€” not scored
Size13 MB8 MB
Age rating17+4+
DeveloperMiguel SchulzGlinberg Robotics, LLC

In-app purchases

None

Clock Drawing Test

No in-app purchases

None

Clock Drawing Test (CDT)

No in-app purchases

Questions

Is Clock Drawing Test free?
Clock Drawing Test is free to download, with no in-app purchases.
Is Clock Drawing Test (CDT) free?
Clock Drawing Test (CDT) is free to download, with no in-app purchases.
Do Clock Drawing Test or Clock Drawing Test (CDT) have ads?
Neither Clock Drawing Test nor Clock Drawing Test (CDT) shows ads.
Which is updated more often, Clock Drawing Test or Clock Drawing Test (CDT)?
Clock Drawing Test ships an update every 25 months, and Clock Drawing Test (CDT) every 10 days. Most recently, Clock Drawing Test was updated on September 30, 2026 and Clock Drawing Test (CDT) on October 9, 2026.

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