# QuickCalculator - All-in-One — Sci, Unit & Business Calc

> Sci, Unit & Business Calc (iPhone/iPad app by KAZUHIRO KAKIMOTO.)

- Source: https://appshunter.io/ios/app/quickcalculator-all-in-one/id1404000437 (this page in markdown: same URL + `.md`)
- Developer: [KAZUHIRO KAKIMOTO](https://appshunter.io/developer/1378277306)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 13.0 · 50 MB
- Languages: American English
- Released: 2018-07-25
- Data updated: 2026-09-05
- User reviews in markdown: https://appshunter.io/ios/app/quickcalculator-all-in-one/id1404000437/reviews.md

## What is QuickCalculator?

QuickCalculator is an all-in-one calculator designed for iPhone, iPad, and Mac. It brings standard, scientific, programmer, and business calculators together with converters, equation solvers, graphing, and practical everyday tools.

CALCULATOR MODES:
• Standard calculator with arithmetic, parentheses, and percentage
• Scientific: trig, log, ln, factorial, powers, roots, constants (pi, e)
• Programmer: binary, octal, decimal, hex with bitwise operations (AND, OR, XOR, NOT, shifts)
• Business: tax, discount, profit margin, and loan calculators

UNIT CONVERTER:
• 6 categories: Length, Weight, Area, Volume, Temperature, Speed
• 40+ units with real-time conversion
• Cooking converter with 10 ingredient units and recipe scaling

ADVANCED TOOLS:
• Equation solver: quadratic (ax²+bx+c) and linear systems (2x2, 3x3)
• Matrix calculator: add, subtract, multiply, transpose, determinant, inverse
• Graphing with expression visualization
• Statistics: count, mean, median, variance, standard deviation

HEALTH:
• BMI calculator with category classification
• BMR calculator (Mifflin-St Jeor) with gender-specific results

MEMORY & HISTORY:
• 50 memory slots with M+, M-, MR, MS, MC
• Calculation history with one-tap restore, search, date filters, and per-tool filters
• Export history as Markdown, CSV, or JSON
• Store history locally or in a supported cloud or remote location

CUSTOMIZATION:
• Precision control: 0–12 decimal places
• Angle units: Radians, Degrees, Gradians
• Haptic feedback on supported devices
• 20+ theme colors with dark and light modes
• Two-pane desktop layout with memory and history sidebar

CURRENCY & EVERYDAY TOOLS:
• Currency converter with live exchange rates, rate charts, and freshness status
• Date and time calculator: date difference, business days, time zones, and time arithmetic
• Percentage, discount, tax, tip, and bill-splitting calculators
• Loan and mortgage tools with prepayment and refinance comparisons
• Tape calculator with an editable paper-roll history

QuickCalculator Pro removes ads and supports continued development through an annual subscription or a one-time lifetime purchase.

Terms of Use: https://kakitiro.com/quickapps/quickcalculator/terms/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Pro - Annual | $0.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Pro - Lifetime | $4.99 | one-time |



## Version history (last 5 releases)

### 5.3.0 — 2026-09-02

• Bug fixes and performance improvements.
• UI and design improvements.

### 5.2 — 2026-08-02

• Bug fixes and performance improvements.
• UI and design improvements.

### 5.1 — 2026-05-23

• Bug fixes and performance improvements.
• UI and design improvements.

### 5.0 — 2026-05-04

• Initial release.
• Standard, scientific, programmer, and business calculators.
• Unit converter with 6 categories and 40+ units.
• Cooking converter with recipe scaling.
• Equation solver (quadratic & linear systems).
• Matrix calculator (2x2 & 3x3).
• Graphing and statistics tools.
• BMI and BMR health calculators.
• Memory (50 slots) and history (200 entries).

### 1.0 — 2018-07-25

This app has been updated by Apple to display the Apple Watch app icon.

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## More apps by KAZUHIRO KAKIMOTO

- [QuickVibrator - Remote Sync](https://appshunter.io/ios/app/quickvibrator-remote-sync/id1378277307)
- [QuickRecorder - Voice Library](https://appshunter.io/ios/app/quickrecorder-voice-library/id1385055809)
- [QuickVideo - Cam & Edit](https://appshunter.io/ios/app/quickvideo-cam-and-edit/id1391871636)
- [QuickExplorer - File & Storage](https://appshunter.io/ios/app/quickexplorer-file-and-storage/id1438535411)
- [QuickEditor - Text & Code](https://appshunter.io/ios/app/quickeditor-text-and-code/id1450712528)

All apps by KAZUHIRO KAKIMOTO: https://appshunter.io/developer/1378277306

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-05.*