# Gengou Lib vs DojoMate

The clearest difference is in-app purchases: Gengou Lib at none against DojoMate's 2. Gengou Lib also leads on iOS requirement (13.0 vs 15.1). DojoMate's advantage is ads (none vs shown) and update cadence (every 4 weeks vs every 61 months). On price and device support there is nothing between them.

Both are free to download. DojoMate sells 2 in-app purchases, starting at $9.99 per month. Gengou Lib asks for nothing beyond the download.

Gengou Lib ships an update every 61 months, DojoMate every 4 weeks. The most recent releases landed on October 14, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Gengou Lib | DojoMate |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.5 (2 ratings)](https://appshunter.io/ios/app/gengou-lib/id284830543/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 84.5% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 61 months | **Every 4 weeks** |
| Monetization | Free | — |
| Size | 6 MB | 40 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Masayuki Akamatsu](https://appshunter.io/developer/284722836) | [SOURCEGRID LABS PTE. LTD](https://appshunter.io/developer/1789077603) |

## What reviewers say

### Gengou Lib

[App page](https://appshunter.io/ios/app/gengou-lib/id284830543)

Quickly convert between Japanese era names and Christian era years. Features include era and year searching, period and era pickers, and the ability to display the current year in either system. Texts can be shown in Japanese or English.

**Highlights:** Era and year search, Period picker, Era picker, Christian era year picker, Japanese era year picker, Show this year button, Multi-language text display

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

**In-app purchases:** none


### DojoMate

[App page](https://appshunter.io/ios/app/dojomate/id6740231616)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DojoMate Premium | $9.99 | per month |
| DojoMate Pro | $29.99 | per month |


## Frequently asked questions

### Is Gengou Lib free?

Gengou Lib is free to download, with no in-app purchases.

### Is DojoMate free?

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

### Do Gengou Lib or DojoMate have ads?

Gengou Lib shows ads; DojoMate does not.

### Which is updated more often, Gengou Lib or DojoMate?

Gengou Lib ships an update every 61 months, and DojoMate every 4 weeks. Most recently, Gengou Lib was updated on October 14, 2026 and DojoMate on October 18, 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.*