# Gengou Lib vs シオリー

The clearest difference is ads: シオリー at none against Gengou Lib's shown. シオリー also leads on update cadence (every 5 days vs every 61 months). Gengou Lib's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 18.1). On price and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Gengou Lib ships an update every 61 months, シオリー every 5 days. The most recent releases landed on October 5, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Gengou Lib | シオリー |
| --- | --- | --- |
| 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 | No |
| Ads | Yes | **No** |
| Update frequency | Every 61 months | **Every 5 days** |
| Monetization | Free | — |
| Size | 6 MB | 19 MB |
| Requires iOS | **13.0** | 18.1 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Masayuki Akamatsu](https://appshunter.io/developer/284722836) | [Takuma Narita](https://appshunter.io/developer/1717604330) |

## 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


### シオリー

[App page](https://appshunter.io/ios/app/id6503470310)

**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 シオリー free?

シオリー is free to download, with no in-app purchases.

### Do Gengou Lib or シオリー have ads?

Gengou Lib shows ads; シオリー does not.

### Which is updated more often, Gengou Lib or シオリー?

Gengou Lib ships an update every 61 months, and シオリー every 5 days. Most recently, Gengou Lib was updated on October 5, 2026 and シオリー on October 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*