# 플라이북 FLYBOOK vs 여우(Kettu)

The clearest difference is in-app purchases: 여우(Kettu) at none against 플라이북 FLYBOOK's 1. 여우(Kettu) also leads on iOS requirement (13.0 vs 15.6). 플라이북 FLYBOOK's advantage is update cadence (fortnightly vs every 6 months). On price, ads and device support there is nothing between them.

Both are free to download. 플라이북 FLYBOOK sells 1 in-app purchase, starting at $9.99 per year. 여우(Kettu) asks for nothing beyond the download.

플라이북 FLYBOOK ships an update fortnightly, 여우(Kettu) every 6 months. The most recent releases landed on October 24, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | 플라이북 FLYBOOK | 여우(Kettu) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (7 ratings)](https://appshunter.io/ios/app/flybook/id912304218/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 96.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 6 months |
| Monetization | Free with in-app purchases | — |
| Size | 112 MB | 29 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Flybook](https://appshunter.io/developer/912304221) | [zerosketch Inc.](https://appshunter.io/developer/1704485995) |

## What reviewers say

### 플라이북 FLYBOOK

[App page](https://appshunter.io/ios/app/flybook/id912304218)

This app helps you build a reading habit by connecting you with others. It encourages small, consistent efforts and provides personalized book recommendations. Track your progress and gain confidence as you read.

**Highlights:** Build reading habits, Social reading community, Personalized book recommendations, Track reading progress, Daily reading encouragement, AI book suggestions

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 플라이북 플러스 1년 | $9.99 | per year |


### 여우(Kettu)

[App page](https://appshunter.io/ios/app/kettu/id6738891172)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 플라이북 FLYBOOK free?

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

### Is 여우(Kettu) free?

여우(Kettu) is free to download, with no in-app purchases.

### Do 플라이북 FLYBOOK or 여우(Kettu) have ads?

Neither 플라이북 FLYBOOK nor 여우(Kettu) shows ads.

### Which is updated more often, 플라이북 FLYBOOK or 여우(Kettu)?

플라이북 FLYBOOK ships an update fortnightly, and 여우(Kettu) every 6 months. Most recently, 플라이북 FLYBOOK was updated on October 24, 2026 and 여우(Kettu) on October 10, 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.*