# Memorize vs MistakeBook

The clearest difference is update cadence: MistakeBook at every 3 weeks against Memorize's every 2 months. MistakeBook also leads on iOS requirement (16.6 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Memorize ships an update every 2 months, MistakeBook every 3 weeks. The most recent releases landed on October 9, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Memorize | MistakeBook |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 24 MB | 183 MB |
| Requires iOS | 18.0 | **16.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tomohiro Kamiyama](https://appshunter.io/developer/1445665207) | [志跃 王](https://appshunter.io/developer/6788202252) |

## What reviewers say

### Memorize

[App page](https://appshunter.io/ios/app/memorize-brain-series/id6757677385)

**Features:** macOS Compatibility

**In-app purchases:** none


### MistakeBook

[App page](https://appshunter.io/ios/app/mistakebook-ai-study-notes/id6788320929)

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

**In-app purchases:** none


## Frequently asked questions

### Is Memorize free?

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

### Is MistakeBook free?

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

### Do Memorize or MistakeBook have ads?

Neither Memorize nor MistakeBook shows ads.

### Which is updated more often, Memorize or MistakeBook?

Memorize ships an update every 2 months, and MistakeBook every 3 weeks. Most recently, Memorize was updated on October 9, 2026 and MistakeBook on October 25, 2026.

---

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