All-in-One Calculator

All-in-One Calculator brings everyday calculations, conversions, and practical tools together in one simple app. Whether you are studying, working, shopping, traveling, or managing daily expenses, the tool you need is always close at hand.
Key features:
• Basic and scientific calculator with percentages, parentheses, powers, square roots, and trigonometric functions • Calculation history with search, notes, locking, and expression reuse • Currency converter with online rate updates and cached data when the network is unavailable • Unit converter for length, area, mass, volume, temperature, speed, time, data, and energy • Shopping tools for discounts, percentages, VAT, tips, and unit-price comparisons • Finance tools for loans, repayment schedules, savings, and GPA calculations • Multiple loan repayment methods with CSV schedule export • Date tools for calculating day differences and saving anniversaries • World clock for checking local times and date differences across cities • Fuel cost and fuel efficiency calculators • Hexadecimal and common number-base conversions • Customizable themes, number formats, default currency, favorite tools, and startup screen
Most calculations work offline. An internet connection is only required when updating currency rates.
Calculation results are estimates for everyday reference only and do not constitute financial, tax, or legal advice.