Citizen Calculator — Your everyday calculation companion. A practical GST calculator, business calculator, unit converter and currency converter in one Android app. Check an invoice, work out a discount, convert a measurement or compare currencies without switching between apps. A familiar calculator layout helps you finish everyday tasks, while customizable tax buttons, themes and button styles let you make it your own. EVERYDAY MATH, MADE FAMILIAR Handle addition, subtraction, multiplication, division, percentages and square roots with the familiar workflow of a traditional business calculator. From household expenses and shopping totals to sales figures and classroom calculations, Citizen Calculator keeps useful functions within easy reach. GST AND CUSTOM TAX CALCULATIONS Use dedicated GST+ and GST− buttons to add tax to a base amount or remove tax from a tax-inclusive total. View the calculated tax components when checking purchases, prices and invoices. Set your own tax rates for frequently used calculations. Prefer a basic calculator? Hide the tax buttons in Settings for a simpler keypad. PERCENTAGES AND BUSINESS MATH Calculate discounts, percentage changes and markups, or use Grand Total to keep track of accumulated results. • Check GST-inclusive and GST-exclusive amounts • Calculate discounts and selling prices • Work out percentage increases and decreases • Perform markup calculations • Add up purchases, expenses and business totals REVIEW YOUR CALCULATIONS Use Check and Correct to review calculation steps and fix entries. Auto Replay lets you replay your steps, while calculation history helps you revisit previous calculations and results. UNIT CONVERTER FOR EVERYDAY TASKS Convert measurements for work, study, shopping and travel. Explore length, area, time, temperature, weight and angle conversions, with additional units across existing categories. Choose your starting and destination units, enter a value and swap the conversion direction when needed. CURRENCY CONVERTER WITH 100 CURRENCIES Compare amounts across 100 currencies for travel planning, international shopping and everyday reference. View the exchange rate, its source and the last refresh time alongside your conversion. Refresh rates when connected to the internet. A CALCULATOR THAT FITS YOUR STYLE Choose from 7 themes, including Basic, Sage Green and Glacier. Customize the button style and decide whether tax buttons appear on your keypad. Basic is always available. Additional themes can be unlocked for 7 days by watching a rewarded video. TAKE A BREAK WITH GAMES Pause between tasks with word, number and logic games. Try Word Match, Word Scramble, Mini Sudoku, Maze and more, with daily progress to follow as you play. OPTIONAL TIME WITHOUT REGULAR ADS Watch a rewarded video to unlock 24 hours without regular ads. Bonus game sets still require a separate rewarded video. BUILT FOR PRACTICAL, EVERYDAY USE Citizen Calculator brings useful tools together for shopkeepers, retailers, small business owners, professionals, students and anyone who regularly works with numbers. Calculate a total. Check the tax. Convert a value. Make the layout yours. Citizen Calculator: https://smartuptech.in/apps/citizen-calculator NOTE Citizen Calculator is a calculation utility and does not provide tax, accounting, investment or legal advice. Verify applicable tax rates before using results for compliance. Currency conversions depend on the displayed rates; your bank or payment provider may apply different rates and fees.