Comparison

Gengou Free vs 億兆電卓

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Gengou Free

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
Read full description

"Gengou Free" 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.

About

億兆電卓

Features
Read full description

『億兆電卓』は、ゼロを何度も押すことなく、国家レベルの大きなケタの数字を計算できる便利な計算機です。 また、3ケタ区切りのカンマがあるので、決算書を見慣れている人にも使いやすく、打ち間違いや、読み間違いを防ぐことができます。そして、計算式も残りますので「検算」にもとても便利です。 テレビのニュースでよく聞くような「何兆円」という大きな数字も日本国民『1.2億』人の数字でわり算することによって、個人の実感の持てる数字として認識できるようになります。 もちろん広告なしで無料です。なによりも、小さなお子様のファイナンス教育の一貫として、大きな数字を簡単に一瞬で扱えるツールとしてご利用いただければ開発側として幸いです。

Screenshots

Gengou Free4 screens
億兆電卓2 screens

Verdict

The call

The clearest difference is rating: 億兆電卓 at 4.0 against Gengou Free's 2.5. 億兆電卓 also leads on ads (none vs shown) and update cadence (every 6 days vs every 44 months). On price, ratings volume, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

億兆電卓 holds the better App Store score, 4.0 against 2.5. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

UpkeepUpdate frequency

Gengou Free ships an update every 44 months, 億兆電卓 every 6 days. The most recent releases landed on October 31, 2026 and November 2, 2026 respectively.

Scorecard3 real differences · 7 level
Gengou Free versus 億兆電卓: the parameters behind the verdict, then further details
ParameterGengou Free億兆電卓
PriceFreeFree
Rating2.5 (2 ratings)4.0 (1 ratings) — better
Positive reviews84.5% of reviews—
Number of ratings2 — better1
Update frequencyEvery 44 monthsEvery 6 days — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.6
Further details — not scored
Size6 MB1 MB
Age rating4+4+
DeveloperMasayuki AkamatsuYouTeacher Inc.

Customer experience

Gengou Free

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews58 reviews
Positive84.5%
Neutral10.3%
Negative5.2%

億兆電卓

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Gengou Free

No in-app purchases

None

億兆電卓

No in-app purchases

Questions

Is Gengou Free free?
Gengou Free is free to download, with no in-app purchases.
Is 億兆電卓 free?
億兆電卓 is free to download, with no in-app purchases.
Which has better reviews, Gengou Free or 億兆電卓?
億兆電卓 is rated higher. Gengou Free averages 2.5 out of 5 from 2 ratings, while 億兆電卓 averages 4.0 from 1 ratings.
Do Gengou Free or 億兆電卓 have ads?
Gengou Free shows ads; 億兆電卓 does not.
Which is updated more often, Gengou Free or 億兆電卓?
Gengou Free ships an update every 44 months, and 億兆電卓 every 6 days. Most recently, Gengou Free was updated on October 31, 2026 and 億兆電卓 on November 2, 2026.

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