# MistakeBook vs Clari Mentor

The clearest difference is update cadence: Clari Mentor at weekly against MistakeBook's every 2 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. MistakeBook sells 1 in-app purchase, starting at $0.99 per 6 months and Clari Mentor sells 4 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

MistakeBook ships an update every 2 weeks, Clari Mentor weekly. The most recent releases landed on September 16, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | MistakeBook | Clari Mentor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/clari-mentor-exam-prep/id6757516331/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 72 MB | 86 MB |
| Requires iOS | 18.6 | 18.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Wei Shuo Wu](https://appshunter.io/developer/527929940) | [Yu Fei Tong](https://appshunter.io/developer/1867407066) |

## What reviewers say

### MistakeBook

[App page](https://appshunter.io/ios/app/mistakebook/id6757340127)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MistakeBook訂閱方案 | $0.99 | per 6 months |


### Clari Mentor

[App page](https://appshunter.io/ios/app/clari-mentor-exam-prep/id6757516331)

This AI-powered study tool offers personalized, on-device tutoring and question management for students. It focuses on privacy, providing step-by-step guidance and tools like flashcards and note generation to enhance learning and retention.

**Highlights:** Privacy-first, on-device operation, Step-by-step AI tutor with phased engine, Subject-aware playbooks and classic strategies, Progressive reveal flashcards with mastery tracking, Enhanced note generation for exam-ready cards, Built-in coaching system

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Clari Mentor - Study Buddy | $0.99 | per month |
| 3-Month Plan: Exam Prep & Focus | $1.99 | per 3 months |
| Clari Mentor - Study Buddy | $7.99 | per year |
| Clari Mentor - Study Buddy | $24.99 | one-time |


## Frequently asked questions

### Is MistakeBook free?

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

### Is Clari Mentor free?

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

### Do MistakeBook or Clari Mentor have ads?

Neither MistakeBook nor Clari Mentor shows ads.

### Which is updated more often, MistakeBook or Clari Mentor?

MistakeBook ships an update every 2 weeks, and Clari Mentor weekly. Most recently, MistakeBook was updated on September 16, 2026 and Clari Mentor on September 9, 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.*