# 音乐计算器 vs 竹知了

The clearest difference is price: 音乐计算器 at Free against 竹知了's $0.99. 音乐计算器 also leads on iOS requirement (15.0 vs 18.0). 竹知了's advantage is update cadence (every 4 days vs every 4 months). On review sentiment, ads, in-app purchases and device support there is nothing between them.

音乐计算器 is free to download; 竹知了 costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

音乐计算器 ships an update every 4 months, 竹知了 every 4 days. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | 音乐计算器 | 竹知了 |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.7 (9 ratings)](https://appshunter.io/ios/app/id1533444439/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 4 days** |
| Monetization | — | Paid |
| Size | 11 MB | 14 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [仕清 刘](https://appshunter.io/developer/1531464103) | [士浩 王](https://appshunter.io/developer/1659573666) |

## What reviewers say

### 音乐计算器

[App page](https://appshunter.io/ios/app/id1533444439)

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

**In-app purchases:** none


### 竹知了

[App page](https://appshunter.io/ios/app/sai/id6797256977)

Experience the traditional Chinese "whistle bug" toy on your iPhone or iPad. Mimic the real toy's sound and motion by drawing circles on the screen, with faster spins producing louder sounds. Enjoy a pure, offline experience with no ads or in-app purchases.

**Highlights:** Realistic physics simulation, Authentic recorded sounds, Multiple control methods, Offline play, No ads or in-app purchases, Local data saving

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

**In-app purchases:** none


## Frequently asked questions

### Is 音乐计算器 free?

音乐计算器 is free to download, with no in-app purchases.

### Is 竹知了 free?

竹知了 costs $0.99, with no in-app purchases.

### Do 音乐计算器 or 竹知了 have ads?

Neither 音乐计算器 nor 竹知了 shows ads.

### Which is updated more often, 音乐计算器 or 竹知了?

音乐计算器 ships an update every 4 months, and 竹知了 every 4 days. Most recently, 音乐计算器 was updated on November 3, 2026 and 竹知了 on November 7, 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.*