Apps by KinkumaDesign
Rapid & Quick Calculator app icon

Finance

Rapid & Quick Calculator

KinkumaDesign

Free download 4.79 · 1 storefront · 1,474 ratings In-app purchases unconfirmed
Open on Apple

About this app

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! This is the free version. A paid version is also available — it removes ads and offers four tax keys (the free version has two).

Latest release

What’s New

Version 6.7.0 May 3, 2026

We've refreshed the wording across all languages for a more natural feel. - Refined translations and wording in each language to feel more natural and easier to read - Added support for iOS 26 - Now requires iOS 17.6 or later - Improved overall stability Thank you for your continued support!

Audience growth

Ratings growth

Steady
7-day gain +0
Ratings / day 0.0
30-day gain +0
US rating-count history
1,474 ratings
1,474 Sep 12, 2026 · 1,474 ratings Sep 12, 2026

Baseline captured. Growth appears after the crawler observes a changed rating count.

Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.

Price tracking

Price intelligence

1 captured event
Current Free
Historical low Free
Paid → free 0×
Price history
Current Free
Free Sep 12, 2026 · Free Sep 12, 2026

First snapshot captured. The trend line starts after the next crawler price observation.

  1. First observed Sep 12, 2026 · 8:37 PM Free

Screenshots

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