The All-In-One Calculator for Android is a free, comprehensive, and user-friendly multi calculator and converter. It is designed to help users solve everyday problems, from simple or complex calculations to unit and currency conversions, percentages, proportions, areas, volumes, and more. The calculator is the result of passionate development and constant feedback from users, making it the best multi calculator on the store. It features over 75 free calculators and unit converters packed in with a simple or scientific calculator, making it the only calculator users will need on their device. <br/><br/>The main calculator has a simple or scientific layout, editable input and cursor, copy and paste support, calculation history, memory buttons, function graphing, dec, hex, and binary, floating calculator, and widget. The app also includes 75 calculators and converters for algebra, geometry, unit converters, finance, health, and miscellaneous. The algebra section includes percentage, proportion, ratio, average, equation solver, combinations and permutations, decimal to fraction, fraction simplifier, prime number checker, greatest common factor and lowest common multiple calculator, and random number generator. <br/><br/>The geometry section includes shape calculators for square, rectangle, parallelogram, trapezoid, rhombus, triangle, pentagon, hexagon, circle, circle arc, and ellipse. The body calculators include cube, rect. prism, square pyramid, sq. pyramid frustum, cylinder, cone, conical frustum, sphere, spherical cap, spherical frustum, and ellipsoid. The unit converters include acceleration, angle, length, energy, force, torque, area, volume, volumetric flow, weight, temperature, pressure, power, speed, mileage, time, digital storage, data transfer speed, numeric base, Roman numerals, shoe size, ring size, and cooking. The finance section includes currency converter with 160 currencies available offline, unit price calculator, sales tax calculator, tip calculator, loan calculator, and simple/compound interest calculator. The health section includes body mass index (BMI), daily calories burn, and body fat percentage. The miscellaneous section includes age calculator, date calculator, time calculator, mileage calculator, and Ohm's law calculator for voltage, current, resistance, and power. <br/><br/>Developed in Transylvania, the All-In-One Calculator for Android is perfect for students, teachers, engineers, handymen, contractors, or anyone who struggles with math and conversions. It provides step-by-step solutions to calculations, making homework and school assignments easier. The app is available for free, and users can create shortcuts on their home screen for easy access.