# Андрей Костаков vs MistakeBook

The clearest difference is update cadence: MistakeBook at monthly against Андрей Костаков's every 29 months. MistakeBook also leads on price ($1.99 vs $2.99) and iOS requirement (13.0 vs 16.0). On ads, in-app purchases and device support there is nothing between them.

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

Андрей Костаков ships an update every 29 months, MistakeBook monthly. The most recent releases landed on September 21, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Андрей Костаков | MistakeBook |
| --- | --- | --- |
| Price | $2.99 | **$1.99** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 29 months | **Monthly** |
| Monetization | — | Paid |
| Size | 602 MB | 26 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kostakov Maxim](https://appshunter.io/developer/524964352) | [Xiamen City Fanyou Network Technology Co., Ltd.](https://appshunter.io/developer/1842524161) |

## What reviewers say

### Андрей Костаков

[App page](https://appshunter.io/ios/app/id1474345404)

**Features:** macOS Compatibility

**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 Андрей Костаков free?

Андрей Костаков costs $2.99, with no in-app purchases.

### Is MistakeBook free?

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

### Do Андрей Костаков or MistakeBook have ads?

Neither Андрей Костаков nor MistakeBook shows ads.

### Which is updated more often, Андрей Костаков or MistakeBook?

Андрей Костаков ships an update every 29 months, and MistakeBook monthly. Most recently, Андрей Костаков was updated on September 21, 2026 and MistakeBook on September 13, 2026.

---

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