Classic calculator
Add, subtract, multiply, divide, work with percentages, signs, decimals, memory controls, chained calculations, and calculation history.
Available now · 2.1
Calculator & Quick Tools
The iCalculator
A retro calculator reborn for modern iPhone and iPad, combining classic tactile circular controls with practical everyday Quick Tools.
Release status: The iCalculator 2.1 is now available on the App Store.
Old-school calculator. New-school tools.
The classic calculator is back.
The large circular controls, tactile feedback, and bold display preserve the personality of the original The iCalculator. Underneath, version 2.0 is a complete modern SwiftUI rebuild for iPhone and iPad.
Kitchen Conversions
Convert cooking volume, weight, and butter measurements with From/To selection, unit swapping, immediate results, and common amount shortcuts.
Quick everyday tools
Temperature, Tip & Split, Percentage & Discount, Date Difference, and Fuel Economy / Trip Cost turn common formulas into focused workflows.
History & settings
Reuse recent results, manage local calculation history, choose appearance, haptics, precision, temperature defaults, and fuel-economy mode.
Quick Tools
Choose the task instead of remembering the formula.
Kitchen Conversions
Volume, weight, and butter conversions for common cooking units, with 1/4, 1/3, 1/2, 3/4, 1, and 2 amount shortcuts.
Temperature
Instant Celsius and Fahrenheit conversion.
Tip & Split
Calculate tip amount, total bill, and amount per person with fast 15%, 18%, 20%, and 25% presets.
Percentage & Discount
Find X% of Y, percentage change, savings, discounts, and final prices without rebuilding the formula each time.
Date Difference
Compare two dates as total days, weeks plus days, or calendar years, months, and days.
Fuel Economy / Trip Cost
Work in MPG or L/100 km to estimate fuel used and trip cost from distance, economy, and fuel price.
Inside the app
Retro personality. Modern utility.
Current release · 2.1
More accurate, reliable, and easier to use.
Version 2.1 improves chained calculations, percentages, signs, memory, decimals, error recovery, history precision, conversion validation, localized number entry, Quick Tool navigation, Larger Text, landscape layouts, keyboard controls, and overall readability.
The 2.0 rebuild
The iCalculator is back.
Version 2.0 completely rebuilds the original HELM Coders calculator for modern iPhone and iPad while preserving its distinctive retro circular controls. New calculation history, extensive Kitchen Conversions, Celsius/Fahrenheit conversion, Tip & Split, Percentage & Discount, Date Difference, Fuel Economy / Trip Cost, new settings, English and Spanish localization, and accessibility improvements make this far more than the original calculator. The old-school calculator is back — with a lot more tricks.
Product information
Private, local, and accessible.
Privacy
No account, login, backend, cloud service, advertising, subscriptions, or in-app purchases in 2.0. Calculations, history, and preferences stay on-device.
Read the full privacy policy →Accessibility
Validated support includes VoiceOver, Voice Control, Dark Interface, Differentiate Without Color Alone, and Reduced Motion.
Read accessibility information →Age suitability
General-purpose calculator and utility with no mature-content categories expected.
View age suitability →