# 知音楼HD vs Floating Clock

The clearest difference is in-app purchases: 知音楼HD at none against Floating Clock's 2. 知音楼HD also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.4). Floating Clock's advantage is update cadence (weekly vs fortnightly) and device support (4 vs 1). On price there is nothing between them.

Both are free to download. Floating Clock sells 2 in-app purchases, starting at $1.99 per 3 months. 知音楼HD asks for nothing beyond the download.

知音楼HD ships an update fortnightly, Floating Clock weekly. The most recent releases landed on September 16, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | 知音楼HD | Floating Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (1K ratings)](https://appshunter.io/ios/app/floating-clock/id1546947240/reviews)** |
| Number of ratings | — | **1K** |
| Positive reviews | — | 59.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 595 MB | 135 MB |
| Requires iOS | **13.0** | 15.4 |
| Devices | iPad | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 17+ | 4+ |
| Developer | [亿度慧达教育科技(北京)有限公司](https://appshunter.io/developer/564755477) | [Hangzhou OrangeJuice Technology Co., Ltd.](https://appshunter.io/developer/1509434108) |

## What reviewers say

### 知音楼HD

[App page](https://appshunter.io/ios/app/hd/id1523039519)

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

**In-app purchases:** none


### Floating Clock

[App page](https://appshunter.io/ios/app/floating-clock/id1546947240)

This app provides millisecond-precision timing and real-time device monitoring to help users successfully participate in flash sales and secure limited-edition items. It offers features like scheduled auto-jump to sale pages and cross-screen AI translation.

**Highlights:** Millisecond floating clock, Multi-platform time sync, Scheduled auto-jump, Real-time device monitoring, Cross-screen AI translation, Data usage monitoring

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Quarterly Membership | $1.99 | per 3 months |
| Lifetime Membership | $4.99 | one-time |

**What reviewers like**

- 🚀 Useful for ticket booking
- 💡 Floating clock feature

**What reviewers complain about**

- 🚨 Excessive ads
- 🐛 Stability issues (black screen, crashes)
- ⚠️ Mandatory internet connection required

**Reported bugs**

- Not compatible with iOS 18
- Floating clock not working with camera app

**Requested features**

- AM/PM time format option
- Android version


## Frequently asked questions

### Is 知音楼HD free?

知音楼HD is free to download, with no in-app purchases.

### Is Floating Clock free?

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

### Do 知音楼HD or Floating Clock have ads?

Floating Clock shows ads; 知音楼HD does not.

### Which is updated more often, 知音楼HD or Floating Clock?

知音楼HD ships an update fortnightly, and Floating Clock weekly. Most recently, 知音楼HD was updated on September 16, 2026 and Floating Clock on September 24, 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.*