Comparison

QuickCalculator vs Dual Calculator

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

Head to head
About

QuickCalculator

Features
Read full description

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/

About

Dual Calculator

Features
Read full description

Two calculators. One screen. Faster calculations. Dual Calculator: Split Screen gives you two calculators in one clean workspace, making it easy to calculate, compare results, and work with multiple numbers without constantly switching screens. Whether you're studying, working with numbers, handling business calculations, or solving scientific math problems, the dual calculator layout helps you work faster and stay focused. KEY FEATURES • TWO CALCULATORS ON ONE SCREEN Run two separate calculations side by side and keep both results visible at the same time. • INSTANT VALUE TRANSFER Move a result from one calculator to the other with a tap. Continue your calculations without memorizing or retyping numbers. • BASIC CALCULATOR Handle everyday calculations quickly with a simple and easy-to-use interface. • SCIENTIFIC CALCULATOR Access scientific functions when you need more advanced calculations for math, science, engineering, or study. • COMPARE RESULTS EASILY Calculate different values simultaneously and compare your results without losing your previous calculation. • BUILT FOR MULTITASKING Perfect when one calculator isn't enough. Work with two calculations independently while keeping everything visible. • FAST AND LIGHTWEIGHT Designed for quick calculations, reliable performance, and an uncomplicated calculator experience. USEFUL FOR Students solving math and science problems, engineers working with multiple values, accountants and business users comparing figures, and anyone who regularly needs more than one calculation at a time. Instead of switching between calculator screens or writing down temporary results, keep two calculations ready at once. Calculate side by side. Compare instantly. Transfer results with a tap. Download Dual Calculator: Split Screen and make everyday calculations faster and easier.

Screenshots

QuickCalculator4 screens
Dual Calculator3 screens

Verdict

The call

The clearest difference is in-app purchases: Dual Calculator at none against QuickCalculator's 2. QuickCalculator's advantage is update cadence (every 2 months vs every 4 months) and iOS requirement (13.0 vs 15.0). On price, ads 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. QuickCalculator sells 2 in-app purchases, starting at $0.99 per year. Dual Calculator asks for nothing beyond the download.

UpkeepUpdate frequency

QuickCalculator ships an update every 2 months, Dual Calculator every 4 months. The most recent releases landed on October 15, 2026 and October 28, 2026 respectively.

Scorecard3 real differences · 3 level
QuickCalculator versus Dual Calculator: the parameters behind the verdict, then further details
ParameterQuickCalculatorDual Calculator
PriceFreeFree
Update frequencyEvery 2 months — betterEvery 4 months
AdsYesYes
In-app purchasesYesNo — better
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size50 MB41 MB
Age rating4+4+
DeveloperKAZUHIRO KAKIMOTOHuzaib Sayyed

In-app purchases

2 purchases

QuickCalculator

Subscriptions1
  • Pro - Annual$0.991 Year
One-time1
  • Pro - Lifetime$4.99
None

Dual Calculator

No in-app purchases

Questions

Is QuickCalculator free?
QuickCalculator is free to download, with in-app purchases available.
Is Dual Calculator free?
Dual Calculator is free to download, with no in-app purchases.
Do QuickCalculator or Dual Calculator have ads?
Both QuickCalculator and Dual Calculator show ads.
Which is updated more often, QuickCalculator or Dual Calculator?
QuickCalculator ships an update every 2 months, and Dual Calculator every 4 months. Most recently, QuickCalculator was updated on October 15, 2026 and Dual Calculator on October 28, 2026.

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