Comparison

World Clock vs シンプル単位変換

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

Head to head
About

World Clock

Easily calculate time differences worldwide by scrolling a dynamic time bar. Add any city, set specific dates and times, and plan international meetings or calls effortlessly. The app syncs with iOS time data.

Highlights
  • Dynamic time bar for instant difference calculation
  • Add and manage multiple cities
  • Direct date and time specification
  • Customizable city names
  • Syncs with iOS time data
Features
Read full description

"World Clock" is the best app to calculate time differences all over the world. All cities' times change automatically just by scrolling it with your finger. Therefore, you don't need to add or subtract times any more to calculate time differences. ■■Features■■ -Scrolling the time bar on the side of the screen up and down simultaneously changes the time in each city to the future or past. -Double-tap the time bar to change the time unit between 1 minute and 1 hour. -You can add any city from the list of cities provided in the app. -Tap each city to specify the date and time directly. -Press and hold on a city to change the city and edit the custom name. -Only one fixed city can be displayed at the top of the screen. ■■Examples of use■■ -International meeting planner -International call -Trip planning Disclaimer:This application has been built with extreme care and attention. However, it does not guarantee the accuracy of the names and times of the cities displayed. Please note that we are not liable whatsoever for any profit loss, or any other form of loss experienced by the customer from using this application. ※We don't have any time difference data in our app. We have been inquiring about time differences of each city to iOS. Therefore, “World Clock” shows you the time of iOS. As a result, depending on the version of iOS you are using, the exact time may not be displayed. If you find a time lag in our app, please confirm default "Clock" app on your iPhone. If the time in "Clock" app is the same with the time in our “World Clock”, it means that our app is running normally. ※Abbreviated name of time zone was originally researched and added. If you notice any mistakes, please contact us from the support site. ※The screenshots are specially edited not to show ads.

About

シンプル単位変換

Features
Read full description

長さ・重さ・温度・体積・面積・速さを、さっと変換できるシンプルな無料アプリ。 ■ 特長 ・6カテゴリの単位変換(長さ/重さ/温度/体積/面積/速さ) ・数値を入れるだけで即座に結果表示 ・変換元・変換先をワンタップで入れ替え ・メートル法とヤード・ポンド法の両対応(インチ・フィート・マイル・オンス・ポンドなど) ・摂氏/華氏/ケルビンの温度変換 ・坪・ヘクタール・エーカーなどの面積単位 ・ダークモード対応、日本語/英語の切り替え 料理・DIY・勉強・旅行など、日常のちょっとした「これ何センチ?」「何度?」にすぐ答えます。余計な機能を省いた、開いてすぐ使える単位変換アプリです。

Screenshots

World Clock4 screens
シンプル単位変換3 screens

Verdict

The call

The clearest difference is update cadence: シンプル単位変換 at weekly against World Clock's every 6 weeks. World Clock's advantage is iOS requirement (15.0 vs 17.0). On price, ads, 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.

UpkeepUpdate frequency

World Clock ships an update every 6 weeks, シンプル単位変換 weekly. The most recent releases landed on November 1, 2026 and October 3, 2026 respectively.

Scorecard2 real differences · 8 level
World Clock versus シンプル単位変換: the parameters behind the verdict, then further details
ParameterWorld Clockシンプル単位変換
PriceFreeFree
Rating3.9 (14 ratings) — better—
Positive reviews77.4% of reviews—
Number of ratings14 — better—
Update frequencyEvery 6 weeksWeekly — better
AdsYesYes
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPod — betteriPhone
Requires iOS15.0 — better17.0
Further details — not scored
Size6 MB3 MB
Age rating4+4+
DeveloperYuki FukuiSearial, Inc.

In-app purchases

None

World Clock

No in-app purchases

None

シンプル単位変換

No in-app purchases

Questions

Is World Clock free?
World Clock is free to download, with no in-app purchases.
Is シンプル単位変換 free?
シンプル単位変換 is free to download, with no in-app purchases.
Do World Clock or シンプル単位変換 have ads?
Both World Clock and シンプル単位変換 show ads.
Which is updated more often, World Clock or シンプル単位変換?
World Clock ships an update every 6 weeks, and シンプル単位変換 weekly. Most recently, World Clock was updated on November 1, 2026 and シンプル単位変換 on October 3, 2026.

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