# card2brain flashcards vs Immunsystem Quiz

The clearest difference is price: card2brain flashcards at Free against Immunsystem Quiz's $1.99. card2brain flashcards also leads on update cadence (every 3 months vs every 45 months). Immunsystem Quiz's advantage is in-app purchases (none vs 2). On ads, device support and iOS requirement there is nothing between them.

card2brain flashcards is free to download; Immunsystem Quiz costs $1.99 up front. card2brain flashcards sells 2 one-off in-app purchases. Immunsystem Quiz asks for nothing beyond the download.

card2brain flashcards ships an update every 3 months, Immunsystem Quiz every 45 months. The most recent releases landed on October 14, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | card2brain flashcards | Immunsystem Quiz |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[4.6 (5 ratings)](https://appshunter.io/ios/app/card2brain-flashcards/id412718155/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 87.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 45 months |
| Monetization | Free | — |
| Size | 17 MB | 16 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 12+ |
| Developer | [webapps Burgdorf GmbH](https://appshunter.io/developer/721318689) | [Coskun CAKIR](https://appshunter.io/developer/1085525577) |

## What reviewers say

### card2brain flashcards

[App page](https://appshunter.io/ios/app/card2brain-flashcards/id412718155)

Create and study flashcards on the go with millions of existing options. Collaborate with friends, join learning groups, and revise systematically using spaced repetition. Access your learning progress across multiple devices, even offline.

**Highlights:** Millions of pre-made flashcards, Create custom flashcards, Spaced repetition learning system, Collaborate and share with friends, Offline study mode, Cross-device synchronization

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PREMIUM (12 months) | $24.99 | one-time |
| TEACHER (12 months) | $39.99 | one-time |


### Immunsystem Quiz

[App page](https://appshunter.io/ios/app/immunsystem-quiz/id1614600324)

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

**In-app purchases:** none


## Frequently asked questions

### Is card2brain flashcards free?

card2brain flashcards is free to download, with in-app purchases available.

### Is Immunsystem Quiz free?

Immunsystem Quiz costs $1.99, with no in-app purchases.

### Do card2brain flashcards or Immunsystem Quiz have ads?

Neither card2brain flashcards nor Immunsystem Quiz shows ads.

### Which is updated more often, card2brain flashcards or Immunsystem Quiz?

card2brain flashcards ships an update every 3 months, and Immunsystem Quiz every 45 months. Most recently, card2brain flashcards was updated on October 14, 2026 and Immunsystem Quiz on October 20, 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.*