# 日本姓氏語源辞典 vs MDX Reader

The clearest difference is in-app purchases: 日本姓氏語源辞典 at none against MDX Reader's 1. MDX Reader's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 14 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. MDX Reader sells 1 one-off in-app purchase. 日本姓氏語源辞典 asks for nothing beyond the download.

日本姓氏語源辞典 ships an update every 14 months, MDX Reader every 2 weeks. The most recent releases landed on November 3, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | 日本姓氏語源辞典 | MDX Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mdx-readerpersonal-dictionary/id6756669176/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 14 months | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 23 MB | 9 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tatsuhiko Miyabe](https://appshunter.io/developer/730295743) | [Yulei Duan](https://appshunter.io/developer/1860295257) |

## What reviewers say

### 日本姓氏語源辞典

[App page](https://appshunter.io/ios/app/id1471109324)

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

**In-app purchases:** none


### MDX Reader

[App page](https://appshunter.io/ios/app/mdx-readerpersonal-dictionary/id6756669176)

This app allows you to build and manage your personal dictionary using MDX/MDD files. It offers powerful offline search, smart favorites, and customizable appearance for a personalized reference experience.

**Highlights:** Unlimited dictionary management, Fast full-text search, Smart favorites for saved words, Customizable appearance, Offline functionality, Cross-dictionary search

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MDX Premium (Lifetime) | $3.99 | one-time |


## Frequently asked questions

### Is 日本姓氏語源辞典 free?

日本姓氏語源辞典 is free to download, with no in-app purchases.

### Is MDX Reader free?

MDX Reader is free to download, with in-app purchases available.

### Do 日本姓氏語源辞典 or MDX Reader have ads?

日本姓氏語源辞典 shows ads; MDX Reader does not.

### Which is updated more often, 日本姓氏語源辞典 or MDX Reader?

日本姓氏語源辞典 ships an update every 14 months, and MDX Reader every 2 weeks. Most recently, 日本姓氏語源辞典 was updated on November 3, 2026 and MDX Reader on October 16, 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.*