# 九章 vs Kosti

The clearest difference is in-app purchases: 九章 at none against Kosti's 1. 九章 also leads on ads (none vs shown) and iOS requirement (9.0 vs 18.2). On price, update cadence and device support there is nothing between them.

Both are free to download. Kosti sells 1 one-off in-app purchase. 九章 asks for nothing beyond the download.

九章 ships an update every 5 months, Kosti every 8 months. The most recent releases landed on October 25, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | 九章 | Kosti |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 months** | Every 8 months |
| Size | 19 MB | 38 MB |
| Requires iOS | **9.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shanghai Di'an Software Tech Co.,Ltd.](https://appshunter.io/developer/726881721) | [Aliaksandr Patskevich](https://appshunter.io/developer/1874179271) |

## What reviewers say

### 九章

[App page](https://appshunter.io/ios/app/id1515534654)

**Features:** macOS Compatibility

**In-app purchases:** none


### Kosti

[App page](https://appshunter.io/ios/app/kosti/id6758647579)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is 九章 free?

九章 is free to download, with no in-app purchases.

### Is Kosti free?

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

### Do 九章 or Kosti have ads?

Kosti shows ads; 九章 does not.

### Which is updated more often, 九章 or Kosti?

九章 ships an update every 5 months, and Kosti every 8 months. Most recently, 九章 was updated on October 25, 2026 and Kosti on October 20, 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.*