US単位コンバーター vs Japan
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
US単位コンバーター
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アメリカ旅行・留学・駐在・海外生活でよく使う単位や計算を、まとめてすばやく確認できる便利ツールです。 華氏と摂氏、マイルとキロ、ポンドとキログラム、ガロンとリットルなど、日本とアメリカで異なる単位をかんたんに変換できます。さらに、時差計算、 チップ計算、USD/JPY為替換算、日米の祝日確認、日本住所の英語表記変換にも対応。 レストランでの会計、運転中の距離感、天気予報の温度、買い物中の重さや容量など、アメリカで「これ日本の感覚だとどれくらい?」と思ったときに役 立ちます。 主な機能: - 温度、距離、長さ、重さ、容量などの単位変換 - mph / km/h、mpg / km/L など車関連の変換 - US / JP の靴・服・指輪サイズ変換 - アメリカと日本の時差計算 - チップ計算と割り勘計算 - USD / JPY 為替換算 - アメリカ・日本の祝日カレンダー - 日本住所の英語表記変換 - 日本語 / 英語表示切り替え アメリカに行く前の準備にも、現地での生活にも使いやすい、シンプルな日米変換アプリです。
Japan
Easily convert between Japanese and US units for length, weight, speed, volume, temperature, area, currency, and time zones. This tool is useful for travel, daily life, work, and study, offering a wide range of conversion categories.
- Length conversion
- Weight conversion
- Speed conversion
- Volume conversion
- Temperature conversion
- Area conversion
- Currency conversion
- Timezone conversion
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This is a handy tool for easy and convenient everyday unit conversions. It is equipped with features useful in various situations, from travel and daily life to work and study. With this app, you can convert units in the following categories: 1. Length (millimeters, centimeters, meters, kilometers ↔ inches, feet, yards, miles) 2. Weight (milligrams, grams, kilograms, tons ↔ ounces, pounds, stones, short tons) 3. Speed (meters/second, kilometers/hour ↔ feet/second, miles/hour) 4. Volume (cubic millimeters, cubic centimeters, cubic meters, liters ↔ cubic inches, cubic feet, fluid ounces, gallons) 5. Temperature (Celsius ↔ Fahrenheit) 6. Area (square millimeters, square centimeters, square meters, hectares ↔ square inches, square feet, acres) 7. Currency (dollars ↔ yen, using the latest exchange rate) 8. Timezone (Japan Standard Time ↔ Eastern Standard Time, Central Standard Time, Mountain Standard Time, Pacific Standard Time, Alaska Standard Time, Hawaii Standard Time) [Premium Version] - No ads within the app - Unlimited number of favorite registrations Terms of Use: https://kn-factory.hatenablog.com/entry/2023/06/25/124505 Privacy Policy: https://kn-factory.hatenablog.com/entry/2023/06/25/124429
Screenshots
Verdict
The clearest difference is in-app purchases: US単位コンバーター at none against Japan's 1. Japan's advantage is update cadence (weekly vs every 3 weeks). On price, ads, 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. Japan sells 1 one-off in-app purchase. US単位コンバーター asks for nothing beyond the download.
US単位コンバーター ships an update every 3 weeks, Japan weekly. The most recent releases landed on June 20, 2026 and July 18, 2026 respectively.
| Parameter | US単位コンバーター | Japan |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.8 (16 ratings) — better |
| Number of ratings | — | 16 — better |
| Update frequency | Every 3 weeks | Weekly — better |
| Ads | Yes | Yes |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 16.4 | 16.2 — better |
| Further details — not scored | ||
| Size | 41 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Taiki Saito | Koya Nambo |
In-app purchases
US単位コンバーター
No in-app purchases
Japan
- Premium$3.99








