# 鬼計算 vs Tone Studio

The clearest difference is in-app purchases: 鬼計算 at none against Tone Studio's 1. 鬼計算 also leads on iOS requirement (15.2 vs 17.0). Tone Studio's advantage is update cadence (every 2 months vs every 5 months). On price, ads and device support there is nothing between them.

Both are free to download. Tone Studio sells 1 one-off in-app purchase. 鬼計算 asks for nothing beyond the download.

鬼計算 ships an update every 5 months, Tone Studio every 2 months. The most recent releases landed on October 27, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | 鬼計算 | Tone Studio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 months | **Every 2 months** |
| Size | 12 MB | 9 MB |
| Requires iOS | **15.2** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [masaaki genno](https://appshunter.io/developer/1611455396) | [hashisoft](https://appshunter.io/developer/466261475) |

## What reviewers say

### 鬼計算

[App page](https://appshunter.io/ios/app/hp/id1613670633)

**Features:** macOS Compatibility

**In-app purchases:** none


### Tone Studio

[App page](https://appshunter.io/ios/app/tone-studio-chinese-pinyin/id6801366273)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is 鬼計算 free?

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

### Is Tone Studio free?

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

### Do 鬼計算 or Tone Studio have ads?

Both 鬼計算 and Tone Studio show ads.

### Which is updated more often, 鬼計算 or Tone Studio?

鬼計算 ships an update every 5 months, and Tone Studio every 2 months. Most recently, 鬼計算 was updated on October 27, 2026 and Tone Studio on October 22, 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.*