# Study Harbors vs MistakeBook

The clearest difference is price: MistakeBook at $1.99 against Study Harbors's $2.99. MistakeBook also leads on iOS requirement (13.0 vs 17.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

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

Study Harbors ships an update fortnightly, MistakeBook monthly. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Study Harbors | MistakeBook |
| --- | --- | --- |
| Price | $2.99 | **$1.99** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | — | Paid |
| Size | 5 MB | 26 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Robert Corbin](https://appshunter.io/developer/1890247992) | [Xiamen City Fanyou Network Technology Co., Ltd.](https://appshunter.io/developer/1842524161) |

## What reviewers say

### Study Harbors

[App page](https://appshunter.io/ios/app/study-harbors/id6770024866)

**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 Study Harbors free?

Study Harbors costs $2.99, with no in-app purchases.

### Is MistakeBook free?

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

### Do Study Harbors or MistakeBook have ads?

Neither Study Harbors nor MistakeBook shows ads.

### Which is updated more often, Study Harbors or MistakeBook?

Study Harbors ships an update fortnightly, and MistakeBook monthly. Most recently, Study Harbors was updated on October 7, 2026 and MistakeBook on October 1, 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.*