# DuoCards vs Flashside

The clearest difference is review sentiment: Flashside at 100% against DuoCards's 63%. Flashside also leads on in-app purchases (none vs 11) and ads (none vs shown). DuoCards's advantage is ratings volume (1.3K vs 2) and iOS requirement (13.0 vs 16.0). 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. Flashside asks for nothing beyond the download.

Flashside holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: DuoCards has 1.3K ratings behind it against 2, 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 100% of Flashside's.

DuoCards ships an update monthly, Flashside every 6 weeks. The most recent releases landed on September 24, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | DuoCards | Flashside |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (1.3K ratings)](https://appshunter.io/ios/app/duocards-vocabulary-builder/id1508159917/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/flashside/id1518971790/reviews)** |
| Number of ratings | **1.3K** | 2 |
| Positive reviews | 63.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 6 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 19 MB | 43 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) | [CQUELLE GmbH](https://appshunter.io/developer/1457513606) |

## 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


### Flashside

[App page](https://appshunter.io/ios/app/flashside/id1518971790)

Create, study, and master any subject with this free flashcard application. It offers offline access, custom deck creation, and smart review features to enhance learning and retention for students and lifelong learners.

**Highlights:** Create custom flashcards, Study offline, Smart review modes, Multi-subject support, 100% free, no ads or subscriptions

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

**In-app purchases:** none


## Frequently asked questions

### Is DuoCards free?

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

### Is Flashside free?

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

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

Flashside is rated higher. DuoCards averages 4.7 out of 5 from 1.3K ratings, while Flashside averages 5.0 from 2 ratings.

### Do DuoCards or Flashside have ads?

DuoCards shows ads; Flashside does not.

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

DuoCards ships an update monthly, and Flashside every 6 weeks. Most recently, DuoCards was updated on September 24, 2026 and Flashside on September 10, 2026.

---

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