# Gengou Free vs JHP byNSDev

The clearest difference is ads: JHP byNSDev at none against Gengou Free's shown. JHP byNSDev also leads on update cadence (every 7 months vs every 44 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

Gengou Free ships an update every 44 months, JHP byNSDev every 7 months. The most recent releases landed on October 23, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Gengou Free | JHP byNSDev |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.5 (2 ratings)](https://appshunter.io/ios/app/gengou-free/id284830543/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 84.5% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 44 months | **Every 7 months** |
| Monetization | Free | — |
| Size | 6 MB | 26 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Masayuki Akamatsu](https://appshunter.io/developer/284722836) | [NIHON SYSTEM DEVELOPER CORPORATION](https://appshunter.io/developer/1198103734) |

## What reviewers say

### Gengou Free

[App page](https://appshunter.io/ios/app/gengou-free/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


### JHP byNSDev

[App page](https://appshunter.io/ios/app/jhp-bynsdev/id1244732477)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Gengou Free free?

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

### Is JHP byNSDev free?

JHP byNSDev is free to download, with no in-app purchases.

### Do Gengou Free or JHP byNSDev have ads?

Gengou Free shows ads; JHP byNSDev does not.

### Which is updated more often, Gengou Free or JHP byNSDev?

Gengou Free ships an update every 44 months, and JHP byNSDev every 7 months. Most recently, Gengou Free was updated on October 23, 2026 and JHP byNSDev on October 3, 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.*