# CLOK by NTTU vs CogniCards

The clearest difference is iOS requirement: CLOK by NTTU at 11.0 against CogniCards's 17.0. On price, update cadence, 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.

CLOK by NTTU ships an update every 2 weeks, CogniCards every 10 days. The most recent releases landed on October 27, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | CLOK by NTTU | CogniCards |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cognicards-study-flashcards/id6788159781/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 10 days** |
| Monetization | — | Free |
| Size | 64 MB | 12 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Foreknowledge CO., LTD.](https://appshunter.io/developer/1414102159) | [Jan Paczkowski](https://appshunter.io/developer/6783297011) |

## What reviewers say

### CLOK by NTTU

[App page](https://appshunter.io/ios/app/clok-by-nttu/id1561122134)

**Features:** macOS Compatibility

**In-app purchases:** none


### CogniCards

[App page](https://appshunter.io/ios/app/cognicards-study-flashcards/id6788159781)

This app uses spaced repetition and active recall to help you learn and remember information effectively. Organize your study material into decks, practice with quizzes, and track your progress with detailed statistics. It's designed for efficient learning across various subjects.

**Highlights:** Spaced repetition algorithm (FSRS), Active recall testing, Rich card formatting (Markdown, images, LaTeX), Deck and folder organization, Quiz and matching game practice modes, Import/export flashcard decks, Progress tracking and statistics

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CLOK by NTTU free?

CLOK by NTTU is free to download, with no in-app purchases.

### Is CogniCards free?

CogniCards is free to download, with no in-app purchases.

### Do CLOK by NTTU or CogniCards have ads?

Neither CLOK by NTTU nor CogniCards shows ads.

### Which is updated more often, CLOK by NTTU or CogniCards?

CLOK by NTTU ships an update every 2 weeks, and CogniCards every 10 days. Most recently, CLOK by NTTU was updated on October 27, 2026 and CogniCards on October 4, 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.*