Keen Calculator & Converter

Keen Calculator is an everyday calculator and a library of more than 400 calculators and converters in one app. It is free, has no ads, needs no account and collects nothing. EVERYDAY CALCULATOR • A clear keypad with a tape that keeps your working in view 400+ CALCULATORS IN 14 CATEGORIES • Pay: overtime, raises, hourly to salary, time cards • Finance: mortgage, loans, compound interest, savings, retirement • Business: margin, markup, discount, sales tax, VAT, break-even • Math, geometry and statistics: percentages, fractions, area, volume, standard deviation • Health and fitness: BMI, calories, running pace • Date and time: age, days between dates, business days • Home, auto, school, tech and everyday: concrete, paint, fuel cost, GPA, tip and bill split ANSWERS AS YOU TYPE • Results update while you type, no Calculate button • Presets, breakdown bars and payment schedules • Worked examples and a plain explanation for every calculator UNIT CONVERTER • Length, weight, temperature, volume, area, speed, data and more IT REMEMBERS • Pin the calculators you use most • Save named setups and load them in one tap • A history of your results PRIVATE BY DESIGN • No ads, no account, no tracking • Every calculation runs on your iPhone; pins, setups and history stay on the device • 16 languages GOOD TO KNOW Health and finance calculators give estimates for general information. They are not medical, tax or financial advice. Keen Calculator is the companion app to keencalculator.com.