# 云上钢琴 vs Rheoflow

The clearest difference is iOS requirement: 云上钢琴 at 9.0 against Rheoflow's 13.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

云上钢琴 ships an update every 5 weeks, Rheoflow every 2 months. The most recent releases landed on October 13, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | 云上钢琴 | Rheoflow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Size | 149 MB | 198 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hunan Yue He Yun Fu Network Technology Co., Ltd.](https://appshunter.io/developer/1160665316) | [深圳走心科技有限公司](https://appshunter.io/developer/1726558173) |

## What reviewers say

### 云上钢琴

[App page](https://appshunter.io/ios/app/id1160665317)

**In-app purchases:** none


### Rheoflow

[App page](https://appshunter.io/ios/app/rheoflow/id6476388045)

**In-app purchases:** none


## Frequently asked questions

### Is 云上钢琴 free?

云上钢琴 is free to download, with no in-app purchases.

### Is Rheoflow free?

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

### Do 云上钢琴 or Rheoflow have ads?

Neither 云上钢琴 nor Rheoflow shows ads.

### Which is updated more often, 云上钢琴 or Rheoflow?

云上钢琴 ships an update every 5 weeks, and Rheoflow every 2 months. Most recently, 云上钢琴 was updated on October 13, 2026 and Rheoflow on October 5, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*