# Bukai vs ReadFlow

The clearest difference is price: ReadFlow at Free against Bukai's $4.99. ReadFlow also leads on iOS requirement (13.0 vs 18.0). Bukai's advantage is update cadence (every 6 days vs every 2 weeks). On ads, in-app purchases and device support there is nothing between them.

ReadFlow is free to download; Bukai costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Bukai ships an update every 6 days, ReadFlow every 2 weeks. The most recent releases landed on October 10, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Bukai | ReadFlow |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 2 weeks |
| Size | 38 MB | 40 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [社桥 郑](https://appshunter.io/developer/1530784065) | [蓓蕾 万](https://appshunter.io/developer/1761276455) |

## What reviewers say

### Bukai

[App page](https://appshunter.io/ios/app/bukai/id6754677532)

**Features:** macOS Compatibility

**In-app purchases:** none


### ReadFlow

[App page](https://appshunter.io/ios/app/readflowweb-novel-ai-reader/id6778378668)

**In-app purchases:** none


## Frequently asked questions

### Is Bukai free?

Bukai costs $4.99, with no in-app purchases.

### Is ReadFlow free?

ReadFlow is free to download, with no in-app purchases.

### Do Bukai or ReadFlow have ads?

Neither Bukai nor ReadFlow shows ads.

### Which is updated more often, Bukai or ReadFlow?

Bukai ships an update every 6 days, and ReadFlow every 2 weeks. Most recently, Bukai was updated on October 10, 2026 and ReadFlow on October 5, 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.*