# Pen Legends vs MistakeBook

The clearest difference is update cadence: MistakeBook at monthly against Pen Legends's every 10 months. MistakeBook also leads on price ($1.99 vs $2.99) and iOS requirement (13.0 vs 16.6). On ads, in-app purchases and device support there is nothing between them.

Pen Legends costs $2.99 and MistakeBook $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Pen Legends ships an update every 10 months, MistakeBook monthly. The most recent releases landed on October 8, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Pen Legends | MistakeBook |
| --- | --- | --- |
| Price | $2.99 | **$1.99** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pen-legends/id6752629755/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Monthly** |
| Monetization | **Free** | Paid |
| Size | 7 MB | 26 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Azmi Abusam](https://appshunter.io/developer/1764321217) | [Xiamen City Fanyou Network Technology Co., Ltd.](https://appshunter.io/developer/1842524161) |

## What reviewers say

### Pen Legends

[App page](https://appshunter.io/ios/app/pen-legends/id6752629755)

Explore literary giants from ancient mystics to modern African authors. Discover writers who shaped human experience through innovative storytelling.

**Highlights:** Literary discovery across cultures, Explore ancient and contemporary voices, Focus on influential writers, Innovative storytelling analysis, Guide to literary greatness

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

**In-app purchases:** none


### MistakeBook

[App page](https://appshunter.io/ios/app/mistakebook-wrong-answer-log/id6770173206)

Log and review incorrect answers to improve learning. Organize mistakes by subject and topic, and utilize spaced repetition to reinforce weak areas. Track progress with visual charts and daily check-ins for effective test preparation.

**Highlights:** Log mistakes with photos and notes, Organize by subject and custom tags, Spaced repetition review mode, Ebbinghaus forgetting curve schedule, Progress charts and stats dashboard, Data import/export backup

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

**In-app purchases:** none


## Frequently asked questions

### Is Pen Legends free?

Pen Legends costs $2.99, with no in-app purchases.

### Is MistakeBook free?

MistakeBook costs $1.99, with no in-app purchases.

### Do Pen Legends or MistakeBook have ads?

Neither Pen Legends nor MistakeBook shows ads.

### Which is updated more often, Pen Legends or MistakeBook?

Pen Legends ships an update every 10 months, and MistakeBook monthly. Most recently, Pen Legends was updated on October 8, 2026 and MistakeBook 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.*