# DuoCards vs HSF Study

The clearest difference is review sentiment: DuoCards at 63% against HSF Study's 27%. DuoCards also leads on iOS requirement (13.0 vs 15.0). HSF Study's advantage is in-app purchases (none vs 11). On price, update cadence, ads 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. HSF Study asks for nothing beyond the download.

DuoCards ships an update monthly, HSF Study every 3 weeks. The most recent releases landed on October 14, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | DuoCards | HSF Study |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (1.3K ratings)](https://appshunter.io/ios/app/duocards-vocabulary-builder/id1508159917/reviews)** | — |
| Number of ratings | **1.3K** | — |
| Positive reviews | **63.2% of reviews** | 27.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 19 MB | 46 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DuoCards s.r.o](https://appshunter.io/developer/1508159916) | [Carl Remigius Fresenius Education AG](https://appshunter.io/developer/681675742) |

## 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


### HSF Study

[App page](https://appshunter.io/ios/app/hsf-study/id1660449017)

Discover suitable Bachelor's or Master's programs with a quiz. Get personalized advice from study counselors and easily apply by scanning your certificates. Manage study documents, access portals, and view your schedule.

**Highlights:** Program finder quiz, Study counseling contact, Certificate scanning for application, Centralized document storage, Bundled portal access, Personalized daily feed, Integrated timetable

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is DuoCards free?

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

### Is HSF Study free?

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

### Do DuoCards or HSF Study have ads?

Both DuoCards and HSF Study show ads.

### Which is updated more often, DuoCards or HSF Study?

DuoCards ships an update monthly, and HSF Study every 3 weeks. Most recently, DuoCards was updated on October 14, 2026 and HSF Study 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.*