# Probability Paradox Lab vs とれる。教科書を撮って作るAI暗記カード｜穴埋め・4択クイズ

The clearest difference is ads: とれる。教科書を撮って作るAI暗記カード｜穴埋め・4択クイズ at none against Probability Paradox Lab's shown. Probability Paradox Lab's advantage is iOS requirement (16.0 vs 26.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Probability Paradox Lab sells 1 one-off in-app purchase and とれる。教科書を撮って作るAI暗記カード｜穴埋め・4択クイズ sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Probability Paradox Lab ships an update every 3 weeks, とれる。教科書を撮って作るAI暗記カード｜穴埋め・4択クイズ monthly. The most recent releases landed on October 7, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Probability Paradox Lab | とれる。教科書を撮って作るAI暗記カード｜穴埋め・4択クイズ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Monthly |
| Size | 18 MB | 2 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Non Kudo](https://appshunter.io/developer/1890455917) | [kazunari aoki](https://appshunter.io/developer/6774180811) |

## What reviewers say

### Probability Paradox Lab

[App page](https://appshunter.io/ios/app/probability-paradox-lab/id6782385785)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Unlock Pack | $0.99 | one-time |


### とれる。教科書を撮って作るAI暗記カード｜穴埋め・4択クイズ

[App page](https://appshunter.io/ios/app/ai4/id6787569636)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| とれる Pro 月額 | $1.99 | per month |
| とれる Pro（買い切り） | $9.99 | one-time |


## Frequently asked questions

### Is Probability Paradox Lab free?

Probability Paradox Lab is free to download, with in-app purchases available.

### Is とれる。教科書を撮って作るAI暗記カード｜穴埋め・4択クイズ free?

とれる。教科書を撮って作るAI暗記カード｜穴埋め・4択クイズ is free to download, with in-app purchases available.

### Do Probability Paradox Lab or とれる。教科書を撮って作るAI暗記カード｜穴埋め・4択クイズ have ads?

Probability Paradox Lab shows ads; とれる。教科書を撮って作るAI暗記カード｜穴埋め・4択クイズ does not.

### Which is updated more often, Probability Paradox Lab or とれる。教科書を撮って作るAI暗記カード｜穴埋め・4択クイズ?

Probability Paradox Lab ships an update every 3 weeks, and とれる。教科書を撮って作るAI暗記カード｜穴埋め・4択クイズ monthly. Most recently, Probability Paradox Lab was updated on October 7, 2026 and とれる。教科書を撮って作るAI暗記カード｜穴埋め・4択クイズ on October 16, 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.*