# 知音楼HD vs 灵犀智慧办公

The clearest difference is device support: 灵犀智慧办公 at 3 against 知音楼HD's 1. 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.

知音楼HD ships an update fortnightly, 灵犀智慧办公 every 2 weeks. The most recent releases landed on October 29, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | 知音楼HD | 灵犀智慧办公 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 75.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 weeks** |
| Size | 595 MB | 310 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [亿度慧达教育科技(北京)有限公司](https://appshunter.io/developer/564755477) | [aaddzz](https://appshunter.io/developer/1543867843) |

## 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


### 灵犀智慧办公

[App page](https://appshunter.io/ios/app/id1549120937)

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

**In-app purchases:** none


## Frequently asked questions

### Is 知音楼HD free?

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

### Is 灵犀智慧办公 free?

灵犀智慧办公 is free to download, with no in-app purchases.

### Do 知音楼HD or 灵犀智慧办公 have ads?

Neither 知音楼HD nor 灵犀智慧办公 shows ads.

### Which is updated more often, 知音楼HD or 灵犀智慧办公?

知音楼HD ships an update fortnightly, and 灵犀智慧办公 every 2 weeks. Most recently, 知音楼HD was updated on October 29, 2026 and 灵犀智慧办公 on October 9, 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.*