# Yan AI vs TransKoi

The clearest difference is in-app purchases: Yan AI at none against TransKoi's 6. Yan AI also leads on update cadence (every 3 days vs fortnightly) and iOS requirement (12.0 vs 14). On price, ads and device support there is nothing between them.

Both are free to download. TransKoi sells 6 in-app purchases, starting at $0.99 per 7 days. Yan AI asks for nothing beyond the download.

Yan AI ships an update every 3 days, TransKoi fortnightly. The most recent releases landed on October 14, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Yan AI | TransKoi |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Fortnightly |
| Size | 77 MB | 22 MB |
| Requires iOS | **12.0** | 14 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [TUN LIANG](https://appshunter.io/developer/1076509991) | [厦门智伽科技有限公司](https://appshunter.io/developer/1851952936) |

## What reviewers say

### Yan AI

[App page](https://appshunter.io/ios/app/yan-ai/id6742533670)

**Features:** macOS Compatibility

**In-app purchases:** none


### TransKoi

[App page](https://appshunter.io/ios/app/transkoi/id6746327674)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| monthly subscribe | $0.99 | per 7 days |
| monthly subscribe | $1.99 | per month |
| 周会员 | $0.99 | one-time |
| 订阅 | $1.99 | one-time |
| 月度会员 | $3.99 | one-time |
| 年度会员 | $9.99 | one-time |


## Frequently asked questions

### Is Yan AI free?

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

### Is TransKoi free?

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

### Do Yan AI or TransKoi have ads?

Neither Yan AI nor TransKoi shows ads.

### Which is updated more often, Yan AI or TransKoi?

Yan AI ships an update every 3 days, and TransKoi fortnightly. Most recently, Yan AI was updated on October 14, 2026 and TransKoi on October 3, 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.*