# 音流Soflux vs TransKoi

The clearest difference is in-app purchases: 音流Soflux at none against TransKoi's 6. TransKoi's advantage is device support (3 vs 1) and iOS requirement (14 vs 16.0). On price, update cadence and ads there is nothing between them.

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

音流Soflux ships an update every 2 weeks, TransKoi fortnightly. The most recent releases landed on September 13, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | 音流Soflux | TransKoi |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Size | 106 MB | 22 MB |
| Requires iOS | 16.0 | **14** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [深圳市矢量律动科技有限公司](https://appshunter.io/developer/1824120103) | [厦门智伽科技有限公司](https://appshunter.io/developer/1851952936) |

## What reviewers say

### 音流Soflux

[App page](https://appshunter.io/ios/app/soflux-aiai/id6744960465)

**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 音流Soflux free?

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

### Is TransKoi free?

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

### Do 音流Soflux or TransKoi have ads?

Neither 音流Soflux nor TransKoi shows ads.

### Which is updated more often, 音流Soflux or TransKoi?

音流Soflux ships an update every 2 weeks, and TransKoi fortnightly. Most recently, 音流Soflux was updated on September 13, 2026 and TransKoi on September 16, 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.*