# CogEval vs Clock Drawing Test (CDT)

The clearest difference is update cadence: Clock Drawing Test (CDT) at every 10 days against CogEval's every 3 months. Clock Drawing Test (CDT) also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

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

CogEval ships an update every 3 months, Clock Drawing Test (CDT) every 10 days. The most recent releases landed on September 29, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | CogEval | Clock Drawing Test (CDT) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/cogeval/id1366437045/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 10 days** |
| Monetization | Free | — |
| Size | 44 MB | 8 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Biogen Inc.](https://appshunter.io/developer/934365576) | [Glinberg Robotics, LLC](https://appshunter.io/developer/1567954262) |

## What reviewers say

### CogEval

[App page](https://appshunter.io/ios/app/cogeval/id1366437045)

This iPad-based assessment tool evaluates cognitive function in multiple sclerosis patients through a two-minute processing speed test. It measures attention, psychomotor speed, visual processing, and working memory, validated against the Symbol Digit Modalities Test. Results are available for healthcare professionals to review.

**Highlights:** Cognitive function evaluation for MS patients, Two-minute processing speed test, Measures attention, psychomotor speed, visual processing, working memory, Validated against SDMT, Summary normed data for healthcare professionals, Resets after each use, no data storage

**In-app purchases:** none


### Clock Drawing Test (CDT)

[App page](https://appshunter.io/ios/app/clock-drawing-test-cdt/id1643602197)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CogEval free?

CogEval 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 CogEval or Clock Drawing Test (CDT) have ads?

Neither CogEval nor Clock Drawing Test (CDT) shows ads.

### Which is updated more often, CogEval or Clock Drawing Test (CDT)?

CogEval ships an update every 3 months, and Clock Drawing Test (CDT) every 10 days. Most recently, CogEval was updated on September 29, 2026 and Clock Drawing Test (CDT) on October 27, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*