# Gengou Lib vs NiLMelia

The clearest difference is in-app purchases: Gengou Lib at none against NiLMelia's 8. Gengou Lib also leads on iOS requirement (13.0 vs 16.4). NiLMelia's advantage is update cadence (every 2 weeks vs every 61 months). On price, ads and device support there is nothing between them.

Both are free to download. NiLMelia sells 8 in-app purchases, starting at $1.99 per month. Gengou Lib asks for nothing beyond the download.

Gengou Lib ships an update every 61 months, NiLMelia every 2 weeks. The most recent releases landed on August 13, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Gengou Lib | NiLMelia |
| --- | --- | --- |
| 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 | Yes |
| Update frequency | Every 61 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 6 MB | 66 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Masayuki Akamatsu](https://appshunter.io/developer/284722836) | [NULL (Gunma)](https://appshunter.io/developer/1892029168) |

## 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


### NiLMelia

[App page](https://appshunter.io/ios/app/nilmelia/id6767229539)

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NiLMelia Premium (Monthly) | $1.99 | per month |
| NiLMelia Premium (3-Month) | $3.99 | per 3 months |
| NiLMelia Premium (Yearly) | $9.99 | per year |
| Add 1 Site Slots | $0.99 | one-time |
| Remove Ads | $2.99 | one-time |
| Add 5 Site Slots | $4.99 | one-time |
| Add 10 Site Slots | $9.99 | one-time |
| Add 30 Site Slots | $19.99 | one-time |


## Frequently asked questions

### Is Gengou Lib free?

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

### Is NiLMelia free?

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

### Do Gengou Lib or NiLMelia have ads?

Both Gengou Lib and NiLMelia show ads.

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

Gengou Lib ships an update every 61 months, and NiLMelia every 2 weeks. Most recently, Gengou Lib was updated on August 13, 2026 and NiLMelia on September 14, 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.*