# 慣用句マスター vs Sonic Math

The clearest difference is price: Sonic Math at Free against 慣用句マスター's $2.99. Sonic Math also leads on update cadence (every 3 weeks vs every 4 months) and iOS requirement (13.0 vs 15.0). 慣用句マスター's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

Sonic Math is free to download; 慣用句マスター costs $2.99 up front. Sonic Math sells 1 one-off in-app purchase. 慣用句マスター asks for nothing beyond the download.

慣用句マスター ships an update every 4 months, Sonic Math every 3 weeks. The most recent releases landed on October 8, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | 慣用句マスター | Sonic Math |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Size | 138 MB | 37 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gloding Inc.](https://appshunter.io/developer/780228385) | [MASAKI CHIBA](https://appshunter.io/developer/1890488277) |

## What reviewers say

### 慣用句マスター

[App page](https://appshunter.io/ios/app/id807324630)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sonic Math

[App page](https://appshunter.io/ios/app/sonic-math-mental-math-drill/id6765611618)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Unlock | $1.99 | one-time |


## Frequently asked questions

### Is 慣用句マスター free?

慣用句マスター costs $2.99, with no in-app purchases.

### Is Sonic Math free?

Sonic Math is free to download, with in-app purchases available.

### Do 慣用句マスター or Sonic Math have ads?

Sonic Math shows ads; 慣用句マスター does not.

### Which is updated more often, 慣用句マスター or Sonic Math?

慣用句マスター ships an update every 4 months, and Sonic Math every 3 weeks. Most recently, 慣用句マスター was updated on October 8, 2026 and Sonic Math on September 27, 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.*