# Card2Memory vs PDF Book Read

The clearest difference is device support: Card2Memory at 4 against PDF Book Read's 2. Card2Memory also leads on iOS requirement (14.0 vs 26.2). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Card2Memory sells 3 one-off in-app purchases and PDF Book Read sells 2 in-app purchases, starting at $1.99 per year. Whichever you choose, the download price is not the number that matters.

Card2Memory ships an update fortnightly, PDF Book Read every 2 weeks. The most recent releases landed on September 18, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Card2Memory | PDF Book Read |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (3 ratings)](https://appshunter.io/ios/app/card2memory/id1003066716/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 57.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 137 MB | 9 MB |
| Requires iOS | **14.0** | 26.2 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Karl-Heinz Loch](https://appshunter.io/developer/909594001) | [Yuya Takamoto](https://appshunter.io/developer/1881459297) |

## What reviewers say

### Card2Memory

[App page](https://appshunter.io/ios/app/card2memory/id1003066716)

This flashcard tool utilizes the Leitner system to optimize learning. Create cards with text, audio, images, or even PDF content. It supports automatic card creation from vocabulary lists and import options for CSV and C2M files.

**Highlights:** Leitner system with 5 boxes, Text, audio, image, and PDF card content, Automatic card creation from vocabulary lists, CSV and C2M file import, Reverse learning option, Save and retrieve flashcard states

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10 additional flashcards | $0.99 | one-time |
| any numer of flashcards from 11 | $1.99 | one-time |
| any number of flashcards | $2.99 | one-time |


### PDF Book Read

[App page](https://appshunter.io/ios/app/pdf-book-read/id6760929497)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual Premium | $1.99 | per year |
| Lifetime Premium | $2.99 | one-time |


## Frequently asked questions

### Is Card2Memory free?

Card2Memory is free to download, with in-app purchases available.

### Is PDF Book Read free?

PDF Book Read is free to download, with in-app purchases available.

### Do Card2Memory or PDF Book Read have ads?

Neither Card2Memory nor PDF Book Read shows ads.

### Which is updated more often, Card2Memory or PDF Book Read?

Card2Memory ships an update fortnightly, and PDF Book Read every 2 weeks. Most recently, Card2Memory was updated on September 18, 2026 and PDF Book Read on September 13, 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.*