# DuoCards vs Polyglot Video Player

The clearest difference is in-app purchases: Polyglot Video Player at none against DuoCards's 11. Polyglot Video Player also leads on ads (none vs shown) and rating (5.0 vs 4.7). DuoCards's advantage is ratings volume (1.5K vs 1) and iOS requirement (13.0 vs 15.1). On price, update cadence and device support there is nothing between them.

Both are free to download. DuoCards sells 10 in-app purchases, starting at $19.99 per month. Polyglot Video Player asks for nothing beyond the download.

Polyglot Video Player holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: DuoCards has 1.5K ratings behind it against 1, so its average is the more settled of the two.

DuoCards ships an update monthly, Polyglot Video Player every 2 months. The most recent releases landed on November 3, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | DuoCards | Polyglot Video Player |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (1.5K ratings)](https://appshunter.io/ios/app/duocards-vocabulary-builder/id1508159917/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/polyglot-video-player/id6756373707/reviews)** |
| Number of ratings | **1.5K** | 1 |
| Positive reviews | 63.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 19 MB | 19 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DuoCards s.r.o](https://appshunter.io/developer/1508159916) | [Sabrina Aridi](https://appshunter.io/developer/1256785942) |

## 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


### Polyglot Video Player

[App page](https://appshunter.io/ios/app/polyglot-video-player/id6756373707)

This app allows you to watch videos with two subtitle tracks displayed simultaneously. It's ideal for language learners to compare translations and original text in real-time, or for multilingual families to enjoy content together.

**Highlights:** Simultaneous dual subtitles, Language learning accelerator, Customizable subtitle display, Wide format support, Smooth playback

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DuoCards free?

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

### Is Polyglot Video Player free?

Polyglot Video Player is free to download, with no in-app purchases.

### Which has better reviews, DuoCards or Polyglot Video Player?

Polyglot Video Player is rated higher. DuoCards averages 4.7 out of 5 from 1.5K ratings, while Polyglot Video Player averages 5.0 from 1 ratings.

### Do DuoCards or Polyglot Video Player have ads?

DuoCards shows ads; Polyglot Video Player does not.

### Which is updated more often, DuoCards or Polyglot Video Player?

DuoCards ships an update monthly, and Polyglot Video Player every 2 months. Most recently, DuoCards was updated on November 3, 2026 and Polyglot Video Player on October 28, 2026.

---

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