Pen Legends vs MistakeBook
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Pen Legends
Explore literary giants from ancient mystics to modern African authors. Discover writers who shaped human experience through innovative storytelling.
- Literary discovery across cultures
- Explore ancient and contemporary voices
- Focus on influential writers
- Innovative storytelling analysis
- Guide to literary greatness
Read full descriptionHide full description
Pen Legends is your guide to literary greatness across cultures and centuries. From ancient Persian mystics to contemporary African voices, discover the writers who didn't just tell stories—they invented new ways of being human.
MistakeBook
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.
- 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
Read full descriptionHide full description
Capture every wrong answer in seconds. Sort mistakes by subject, tag key topics, and build a personal error bank—no account required. Preparing for midterms, finals, or standardized tests? Spaced review quizzes follow the forgetting curve so weak spots come back at the right time. See progress charts and daily check-ins to stay on track. • Log mistakes with photos, notes, and difficulty tags • Organize by subject, chapter, and custom tags • Review mode: quiz, practice, and spaced repetition • Ebbinghaus schedule for smarter recall • Stats dashboard: mastery trends and weak areas • Import/export backup—data stays on your device Built for students who want a simple, private way to turn errors into higher scores.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Pen Legends | MistakeBook |
|---|---|---|
| Price | $2.99 | $1.99 — better |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Every 10 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Azmi Abusam | Xiamen City Fanyou Network Technology Co., Ltd. |
Customer experience
Pen Legends
MistakeBook
In-app purchases
Pen Legends
No in-app purchases
MistakeBook
No in-app purchases
Questions
Is Pen Legends free?
Is MistakeBook free?
Do Pen Legends or MistakeBook have ads?
Which is updated more often, Pen Legends or MistakeBook?
Other comparisons
