Calculator Pro: Unit & Tax

Calculator Pro is a fast, easy-to-use scientific calculator for everyday math, school work, finance, and unit conversion.

Use it as a simple calculator for quick arithmetic, a scientific calculator for advanced formulas, and an all-in-one converter for common daily calculations.

Key features:
- Basic calculator with clean input, calculation history, copy result, voice readout, and haptic feedback.
- Scientific calculator with trigonometric functions, constants, powers, roots, radians, degrees, and more.
- Fraction calculator for addition, subtraction, multiplication, and division of fractions.
- Unit converter for length, area, volume, temperature, speed, time, weight, pressure, storage, power, heat, force, angle, density, resistance, fuel consumption, and energy.
- Currency converter with exchange-rate tools for many countries and regions.
- Loan calculator for mortgage, commercial loans, provident fund loans, and mixed loans with detailed repayment results.
- Tax calculator for paycheck, income tax, social insurance, housing fund, year-end bonus, and related salary calculations.
- Date calculator, age calculator, BMI calculator, world time, and number-to-words conversion.

Calculator Pro is designed for users who want one reliable calculator app instead of switching between separate scientific calculator, unit converter, currency converter, loan calculator, tax calculator, and date calculator apps.

Useful for students, engineers, office workers, finance tasks, shopping, travel, budgeting, and daily math.