Comparison

ローン計算 @返済くんLoan.PRO vs Rapid & Quick Calculator Pro

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

Head to head
About

ローン計算 @返済くんLoan.PRO

Features
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【返済くんシリーズ累計20万ダウンロード突破(2025/12時点)】 追加費用なし。 一度の購入で、すべてのプロ機能を永続的に。 「返済くん Loan.PRO」は、不動産仲介・住宅メーカー・金融機関のプロフェッショナルが、接客の現場で「瞬時に」正確なローン計算を行うために設計された、買い切り型の高機能ローン計算アプリです。 ■ 買い切り版を選ぶ理由 本アプリはサブスクリプション制ではありません。 一度ご購入いただければ、月々の支払いを気にすることなく、すべての高度な計算機能と入力支援機能を無期限でご利用いただけます。 1. 圧倒的な入力スピード(入力支援ボタン) 1,000万円、100万円、年収100万円単位などのクイックボタンを搭載。 キーボードを叩く手間を省き、お客様との会話を止めることなく、指先一つで瞬時に条件を入力できます。 2. プロの現場に即した詳細設定 • 金利微調整(▲▼ボタン): 短押し・長押しで金利を細かく調整。加減値は自分のスタイルに合わせてカスタマイズ可能です。 • 返済比率表の任意設定: 取引先金融機関に合わせた審査基準(返済比率表)を事前登録し、瞬時に切り替えられます。 • 2段階金利・元金均等返済: あらゆる融資商品に対応する柔軟な計算ロジックを搭載しています。 3. 現場で役立つ「逆算機能」 「今の年収でいくら借りられる?」「毎月の支払いを○円にするには、いくらの物件が買える?」といった現場で最も多い質問に、その場で即答できる逆算(必要年収・借入可能額算出)機能を完備。 ■ 主な機能 • 住宅ローン計算:元利均等、元金均等、2段階金利返済 • 資金計画の逆算:返済比率、必要最低年収、借入可能額の算出 • 詳細表示:総返済額、利息合計、利息割合をワンタップで確認 • ユニバーサル仕様:iPad、iPhoneの両方で最適化されたレイアウト ■ 開発者の想い 2012年のリリース以来、多くのプロの皆様に支えられてきました。 現場で本当に使いやすい「道具」であるために、無駄な装飾を省き、実務に必要な機能だけを研ぎ澄ませています。 「道具にはこだわりたいが、月額課金は避けたい」というプロフェッショナルの皆様に、自信を持っておすすめいたします。 ご要望やお問い合わせは、サポートメール(gg41124@gmail.com)までお気軽にご連絡ください。

About

Rapid & Quick Calculator Pro

This calculator app offers essential functions plus advanced features like sales tax and discount calculations. Easily reuse past answers, edit expressions with cursor keys, and customize themes and fonts. Share your calculations with others.

Highlights
  • History tape for reusing answers
  • Sales tax and discount calculations
  • Precise rounding settings
  • Editable expressions with cursor keys
  • Multiple color themes and font options
  • Share expressions and answers
Features
Currently charting
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Over 300,000 downloads worldwide! A fast, friendly calculator built for everyday use — shopping, splitting bills, household budgeting, and more. FEATURES * History Tape — review your past calculations and reuse any answer with a single tap * Expression Input — type the whole equation, just like you'd write it on paper * Sales Tax — toggle tax-included/excluded with a single button; swipe to switch between multiple tax rates * Percentage Discounts — e.g. 100 - 30% = 70 * Precise Rounding Settings * Multiple Color Themes * Multiple Font Sizes and Typefaces * Arrow Keys — move the cursor left or right to edit any part of the expression * Share — send expressions and answers to other apps * iPad Support — including Slide Over and Split View on supported devices * Sound Effects To reuse or edit an equation from your history, swipe left on it (or touch and hold) to open the menu. We'd love to hear your feedback!

Screenshots

ローン計算 @返済くんLoan.PRO4 screens
Rapid & Quick Calculator Pro4 screens

Verdict

The call

The clearest difference is ads: ローン計算 @返済くんLoan.PRO at none against Rapid & Quick Calculator Pro's shown. ローン計算 @返済くんLoan.PRO also leads on iOS requirement (15.0 vs 17.6). Rapid & Quick Calculator Pro's advantage is chart position (#84 vs unranked). On price, update cadence, 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

ローン計算 @返済くんLoan.PRO costs $3.99 and Rapid & Quick Calculator Pro $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 5 months. Both last shipped on November 1, 2026.

Scorecard3 real differences · 8 level
ローン計算 @返済くんLoan.PRO versus Rapid & Quick Calculator Pro: the parameters behind the verdict, then further details
Parameterローン計算 @返済くんLoan.PRORapid & Quick Calculator Pro
Price$3.99$3.99
Rating—4.9 (206 ratings) — better
Positive reviews—90.1% of reviews
Number of ratings—206 — better
Update frequencyEvery 5 monthsEvery 5 months
AdsNo — betterYes
In-app purchasesNoNo
Monetization—Paid
Best chart rank—#84 — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.6
Further details — not scored
Size1 MB7 MB
Age rating4+4+
Developerichiro taniokaKinkumaDesign

Bugs and requests

ローン計算 @返済くんLoan.PRO

Not enough reviews yet to summarise bugs or requests.

Rapid & Quick Calculator Pro

Reported bugs

8 issues
  • App crashes when pasting copied expression and pressing equals
  • Random calculations appear in current box after clearing and reopening
  • Laggy drawing of input on startup
  • App becomes unusable on iPad after screen switching
  • Swipe response is poor
Show 3 more
  • Sound effects stopped working despite being enabled
  • History is lost when switching to background and returning
  • Paid version tax buttons are not functional

Requested features

11 requests
  • Dark mode for icon
  • Larger calculation display window
  • Separate tax buttons (pre/post tax)
  • Vibration option for input
  • Add memo to history
Show 6 more
  • Sort history by newest
  • Button for billions/ten millions
  • Square root function
  • Setting for decimal places
  • Setting for decimal marks
  • Continuous calculation without equals

In-app purchases

None

ローン計算 @返済くんLoan.PRO

No in-app purchases

None

Rapid & Quick Calculator Pro

No in-app purchases

Questions

Is ローン計算 @返済くんLoan.PRO free?
ローン計算 @返済くんLoan.PRO costs $3.99, with no in-app purchases.
Is Rapid & Quick Calculator Pro free?
Rapid & Quick Calculator Pro costs $3.99, with no in-app purchases.
Do ローン計算 @返済くんLoan.PRO or Rapid & Quick Calculator Pro have ads?
Rapid & Quick Calculator Pro shows ads; ローン計算 @返済くんLoan.PRO does not.
Which is updated more often, ローン計算 @返済くんLoan.PRO or Rapid & Quick Calculator Pro?
ローン計算 @返済くんLoan.PRO ships an update every 5 months, and Rapid & Quick Calculator Pro every 5 months. Most recently, ローン計算 @返済くんLoan.PRO was updated on November 1, 2026 and Rapid & Quick Calculator Pro on November 1, 2026.

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