Gengou Lib vs 元号変換
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Gengou Lib
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.
- Era and year search
- Period picker
- Era picker
- Christian era year picker
- Japanese era year picker
- Show this year button
- Multi-language text display
Read full descriptionHide full description
"Gengou Lib." is a quick reference of the Japanese era system. This application has functions as below. - Era and Year Search - Period picker - Era picker - Christian era year picker - Japanese era year picker - Show this year button - Texts can be shown in Japanese or English independently of the default language setting. - Application badge can show this year number in the Japanese era or the Christian era. The Japanese era system identifies a year by the combination of the era name (Gengou or Nengou) and the year number within the era. For example, A.D. 2001 is Heisei 13. Please note that two Gengou schemes were used in Parallel from 1331 to 1392 during Nanboku-chō period. This application would be very useful if you are working with the governments, municipal offices and/or certain companies in Japan.
元号変換
Read full descriptionHide full description
このアプリは、元号の変換を行う為のものです。 西暦、和暦、皇紀をそれぞれ変換する事が出来ます。 また、年齢（期間）を基準に年号を算出する事も出来ます。 以下のような計算を簡単に出来ます。 ・明治１５年は、西暦何年か、皇紀で何年か？ ・西暦１４５２年は、和暦で何の何年か、皇紀で何年か？ ・明治１５年の４０年前は、何年か？ ・明治１５年の４０年後は、何年か？
Screenshots
Verdict
The clearest difference is review sentiment: Gengou Lib at 84% against 元号変換's 33%. 元号変換's advantage is ads (none vs shown) and update cadence (every 9 months vs every 61 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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, 元号変換 every 9 months. The most recent releases landed on October 14, 2026 and October 13, 2026 respectively.
| Parameter | Gengou Lib | 元号変換 |
|---|---|---|
| Price | Free | Free |
| Rating | 2.5 (2 ratings) — better | — |
| Positive reviews | 84.5% of reviews — better | 33.3% of reviews |
| Number of ratings | 2 — better | — |
| Update frequency | Every 61 months | Every 9 months — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Masayuki Akamatsu | Seiji Nagano |
Customer experience
Gengou Lib
元号変換
In-app purchases
Gengou Lib
No in-app purchases
元号変換
No in-app purchases
