Comparison

Digital Japanese Clock vs 台形の完全計算アプリ

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

Head to head
About

Digital Japanese Clock

Experience the Edo period's unique timekeeping with this digital clock. It simulates the indefinite time method, dividing days and nights into variable lengths. Customize sounds, displays, and backgrounds for an immersive historical experience.

Highlights
  • Indefinite time method simulation
  • Customizable bell sounds (drums, cannons, cuckoo)
  • Multiple display options (zodiac, numerals, emojis)
  • Adjustable background color and font
  • Optional modern sub-clock display
  • Settings for time methods and display elements
Features
Read full description

A wadokei is a mechanical clock made in Japan during the Edo period. At that time, Japan used a unique time system called the "indefinite time method". It is a method of dividing the day into day and night and then dividing each into equal parts. The common people of the Edo period began their day's activities by listening to the "dawn six bells" about 30 minutes before sunrise and ended their activities by listening to the "dusk six bells" about 30 minutes after sunset. Naturally, the time of sunrise and sunset varied with the seasons, so the time of bell ringing and the length of the unit of time, ittoki, between day and night also changed greatly. But not only was this perfectly acceptable at the time, it was also an eco-friendly way of living that suited their body rhythms very well. This app is a digital representation of this indefinite time method. The hour bells can be switched not only to the sound of bells, but also to drums, cannons, cuckoo, pillar clocks, etc. The main display can be selected from zodiac signs, numerals, and emojis. You can open the settings screen by tapping twice on the main display or by tapping the settings icon. You can change the background color, font, time methods, show/hide sub-clock, etc. here. The sub-clock in the lower left corner of the screen can also display a modern clock. You can switch the display between 24 hours, 12 hours, numerals, and zodiac signs with each tap. Please use this application and experience the rhythm of life in the Edo period. Perhaps you will discover something good.

About

台形の完全計算アプリ

Features
Read full description

Trapezoiderは、台形に関する計算をすばやく、美しく、直感的に行うための計算アプリです。 面積、角度、長さ、体積、図心など、台形でよく使う計算をひとつのアプリにまとめました。黒と金を基調にした見やすい画面で、入力した値に合わせて図形がリアルタイムに変化します。 主な機能 ・面積計算 上底、下底、高さ、面積のうち3つを入力すると、残り1つを自動計算します。 ・角度計算 底角、上角、片側張出などを計算できます。台形の形を確認しながら、角度の関係を把握できます。 ・長さ計算 上底、下底、高さから脚の長さや対角線を計算できます。 ・体積計算 円錐台、台形断面の角柱、四角錐台の体積計算に対応しています。用途に合わせてモードを切り替えられます。 ・図心計算 台形の図心位置を計算できます。建築、土木、設計、学習用途で便利です。 ・表示設定 小数点以下の桁数、四捨五入、切り捨て、切り上げ、表示単位を設定できます。 こんな方におすすめ ・中学、高校、大学で図形や工学を学ぶ方 ・授業や教材作成で台形の計算を確認したい先生 ・DIY、外構、間取り、面積計算を行う方 ・建築、土木、測量、設計の現場で素早く数値を確認したい方 Trapezoiderは、単なる計算機ではありません。 台形に特化することで、必要な入力、結果、図形の変化をひとつの画面で自然に確認できるように設計しています。 台形の計算を、もっと速く。 そして、もっと美しく。

Screenshots

Digital Japanese Clock4 screens
台形の完全計算アプリ4 screens

Verdict

The call

The clearest difference is price: Digital Japanese Clock at Free against 台形の完全計算アプリ's $2.99. 台形の完全計算アプリ's advantage is in-app purchases (none vs 1) and ads (none vs shown). On 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

CostPrice · In-app purchases · Ads · Monetization

Digital Japanese Clock is free to download; 台形の完全計算アプリ costs $2.99 up front. Digital Japanese Clock sells 1 one-off in-app purchase. 台形の完全計算アプリ asks for nothing beyond the download.

UpkeepUpdate frequency

Digital Japanese Clock ships an update every 6 weeks, 台形の完全計算アプリ daily. The most recent releases landed on October 17, 2026 and October 25, 2026 respectively.

Scorecard4 real differences · 6 level
Digital Japanese Clock versus 台形の完全計算アプリ: the parameters behind the verdict, then further details
ParameterDigital Japanese Clock台形の完全計算アプリ
PriceFree — better$2.99
Rating2.0 (1 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 6 weeksDaily — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.013.0 — better
Further details — not scored
Size6 MB19 MB
Age rating4+4+
DeveloperMihoko Arakikotobaz

In-app purchases

1 purchases

Digital Japanese Clock

One-time1
  • No Ads$1.99
None

台形の完全計算アプリ

No in-app purchases

Questions

Is Digital Japanese Clock free?
Digital Japanese Clock is free to download, with in-app purchases available.
Is 台形の完全計算アプリ free?
台形の完全計算アプリ costs $2.99, with no in-app purchases.
Do Digital Japanese Clock or 台形の完全計算アプリ have ads?
Digital Japanese Clock shows ads; 台形の完全計算アプリ does not.
Which is updated more often, Digital Japanese Clock or 台形の完全計算アプリ?
Digital Japanese Clock ships an update every 6 weeks, and 台形の完全計算アプリ daily. Most recently, Digital Japanese Clock was updated on October 17, 2026 and 台形の完全計算アプリ on October 25, 2026.

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