Photomath is free and works without wi-fi or data. Handles math problems that include fractions, decimal numbers, linear equations, and several functions like logarithms. It w orks only with the printed text, it won’t be solving your scribbles. PhotoMath is an app that utilizes your phone camera to solve maths problems. Health calc measures BMI, BMR, body fat percentage, and calorie calculators to help you keep track of your body weight. The fractions/percentage calculator features basic functions. The financial one includes interest calculators using simple and compound interest along with a savings calculator and planner. The unit converter supports Energy, temperature, length, weight, area, volume, Speed, and many more measurement units along with a currency converter. The standard calculator includes percent key, negative sign, brackets, and history viewer whereas the advanced mode includes memory keys and functions for trigonometry, roots, exponents, and logarithm found in scientific calculators. It is a free calculator app for Android featuring over 75+ calculators and unit converters categorized under percentage, shapes, finance, currency converter, Geometry, Unit Converters, Finance, Health, and more. Here is the list of best calculator apps for android: 1.