# DuoCards vs Krok

The clearest difference is rating: DuoCards at 4.7 against Krok's 1.0. DuoCards also leads on ratings volume (1.3K vs 1) and iOS requirement (13.0 vs 16.0). Krok's advantage is ads (none vs shown). On price, review sentiment, update cadence and in-app purchases there is nothing between them.

Both are free to download. DuoCards sells 10 in-app purchases, starting at $19.99 per month and Krok sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

DuoCards holds the better App Store score, 4.7 against 1.0. That said, the two scores are not equally well evidenced: DuoCards has 1.3K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 63% of DuoCards's written reviews are positive against 57% of Krok's.

DuoCards ships an update monthly, Krok every 3 weeks. The most recent releases landed on October 15, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | DuoCards | Krok |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (1.3K ratings)](https://appshunter.io/ios/app/duocards-vocabulary-builder/id1508159917/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/krok-testing/id6469338819/reviews) |
| Number of ratings | **1.3K** | 1 |
| Positive reviews | **63.1% of reviews** | 57.1% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 19 MB | 24 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [DuoCards s.r.o](https://appshunter.io/developer/1508159916) | [Anatoly Sorochan](https://appshunter.io/developer/972443742) |

## What reviewers say

### DuoCards

[App page](https://appshunter.io/ios/app/duocards-vocabulary-builder/id1508159917)

Master a new language with interactive flashcards and video courses. This app helps you build vocabulary, guess words, and track your progress across over 50 languages. Learn effectively through spaced repetition and integrated translation tools.

**Highlights:** Flashcard learning with spaced repetition, Video language courses with interactive subtitles, Integrated translator for over 50 languages, Vocabulary builder and progress tracker, Guess words and phrases to sharpen skills, Read foreign language articles

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DuoCards Premium | $19.99 | per month |
| DuoCards Plus | $33.00 | per 3 months |
| DuoCards Premium | $34.99 | per 3 months |
| DuoCards Premium | $49.99 | per year |
| DuoCards Premium | $64.90 | per year |
| DuoCards Premium | $67.99 | per year |
| DuoCards Premium | $107.99 | per year |
| DuoCards Premium | $109.00 | per year |
| DuoCards Premium | $113.99 | per year |
| DuoCards Premium | $162.99 | per year |

**What reviewers like**

- 👍 Easy to use
- 💡 Customizable flashcards
- 🚀 Efficient learning algorithm
- 🐘 Cute mascot (Memo the mammoth)

**What reviewers complain about**

- 🐛 Bugs and crashes
- ⚠️ Unreliable server connection
- 💰 Expensive subscription
- 🤔 Confusing interface

**Reported bugs**

- App freezes and crashes
- Issues with logging in and accessing content
- Inconsistent behavior when adding new words
- Problems with video playback and subtitles

**Requested features**

- Offline mode
- More customization options
- Improved spaced repetition system
- Better integration with other language learning tools


### Krok

[App page](https://appshunter.io/ios/app/krok-testing/id6469338819)

Prepare for KROK exams with a comprehensive testing application. Access a vast library of questions across various categories and topics to enhance your knowledge. Track your progress with interactive tests and assess your understanding effectively.

**Highlights:** Wide selection of KROK exam tests, Large number of questions, Category and topic selection, Interactive tests, Progress tracking, Knowledge assessment

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month | $1.99 | per month |
| 3 months | $4.99 | per 3 months |
| 6 months | $7.99 | per 6 months |


## Frequently asked questions

### Is DuoCards free?

DuoCards is free to download, with in-app purchases available.

### Is Krok free?

Krok is free to download, with in-app purchases available.

### Which has better reviews, DuoCards or Krok?

DuoCards is rated higher. DuoCards averages 4.7 out of 5 from 1.3K ratings, while Krok averages 1.0 from 1 ratings.

### Do DuoCards or Krok have ads?

DuoCards shows ads; Krok does not.

### Which is updated more often, DuoCards or Krok?

DuoCards ships an update monthly, and Krok every 3 weeks. Most recently, DuoCards was updated on October 15, 2026 and Krok on September 23, 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.*