# DuoCards vs Flow

The clearest difference is rating: DuoCards at 4.7 against Flow's 1.0. DuoCards also leads on ratings volume (1.3K vs 1) and iOS requirement (13.0 vs 15.1). Flow's advantage is ads (none vs shown) and update cadence (weekly vs monthly). On price, review sentiment, in-app purchases and monetization model there is nothing between them.

Both are free to download. DuoCards sells 10 in-app purchases, starting at $19.99 per month and Flow sells 2 in-app purchases, starting at $5.99 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 complicate that: 63% of DuoCards's written reviews are positive against 67% of Flow's, so the app with the better star average is not the one people write more warmly about.

DuoCards ships an update monthly, Flow weekly. The most recent releases landed on October 15, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | DuoCards | Flow |
| --- | --- | --- |
| 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/flow-language-lessons/id6498631478/reviews) |
| Number of ratings | **1.3K** | 1 |
| Positive reviews | 63.1% of reviews | **66.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Weekly** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 19 MB | 62 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DuoCards s.r.o](https://appshunter.io/developer/1508159916) | [Christian Hibberd](https://appshunter.io/developer/1726115062) |

## 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


### Flow

[App page](https://appshunter.io/ios/app/flow-language-lessons/id6498631478)

This app offers a personalized language learning experience for intermediate to advanced learners. It uses real-world content like TV shows and podcasts to create engaging lessons tailored to your interests and skill level, helping you achieve fluency faster.

**Highlights:** Personalized learning paths, Real-world content integration, Adaptive to skill level, Progress tracking, Focus on fluency, Interest-based learning

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $5.99 | per month |
| Yearly Plan | $59.99 | per year |


## Frequently asked questions

### Is DuoCards free?

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

### Is Flow free?

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

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

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

### Do DuoCards or Flow have ads?

DuoCards shows ads; Flow does not.

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

DuoCards ships an update monthly, and Flow weekly. Most recently, DuoCards was updated on October 15, 2026 and Flow on October 1, 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.*