# Gengou Lib vs 年号早見メモ帳

The clearest difference is price: Gengou Lib at Free against 年号早見メモ帳's $0.49. Gengou Lib also leads on iOS requirement (13.0 vs 26.0). 年号早見メモ帳's advantage is ads (none vs shown) and update cadence (every 5 weeks vs every 61 months). On review sentiment, in-app purchases and device support there is nothing between them.

Gengou Lib is free to download; 年号早見メモ帳 costs $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.

Gengou Lib ships an update every 61 months, 年号早見メモ帳 every 5 weeks. The most recent releases landed on August 13, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Gengou Lib | 年号早見メモ帳 |
| --- | --- | --- |
| Price | **Free** | $0.49 |
| Rating | **[2.5 (2 ratings)](https://appshunter.io/ios/app/gengou-lib/id284830543/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | **84.5% of reviews** | 80.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 61 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 6 MB | 98 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Masayuki Akamatsu](https://appshunter.io/developer/284722836) | [OGUMA PRODUCTS](https://appshunter.io/developer/1609036383) |

## 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


### 年号早見メモ帳

[App page](https://appshunter.io/ios/app/id6444688663)

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

**In-app purchases:** none


## Frequently asked questions

### Is Gengou Lib free?

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

### Is 年号早見メモ帳 free?

年号早見メモ帳 costs $0.49, with no in-app purchases.

### Do Gengou Lib or 年号早見メモ帳 have ads?

Gengou Lib shows ads; 年号早見メモ帳 does not.

### Which is updated more often, Gengou Lib or 年号早見メモ帳?

Gengou Lib ships an update every 61 months, and 年号早見メモ帳 every 5 weeks. Most recently, Gengou Lib was updated on August 13, 2026 and 年号早見メモ帳 on September 17, 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.*