Chrona Calc

Chrona Calc combines scientific calculations, age insights, date comparisons, unit conversions and everyday finance tools in one offline app. SCIENTIFIC CALCULATOR • Perform arithmetic with parentheses, percentages and powers. • Use square roots, logarithms, absolute values and trigonometric functions. • Switch between degree and radian modes. • Edit expressions, use calculator memory and copy results. AGE CALCULATOR • Calculate age in years, months and days. • Choose a birth date and a comparison date. • View total days, completed months and weeks. • See your birth weekday and next-birthday countdown. • Save or share age results. DATE DIFFERENCE • Calculate the days between two dates. • Optionally include both dates. • View the difference in weeks and days. UNIT CONVERTER • Convert length, mass, area, volume, speed and temperature. • Swap source and destination units. • Save or share conversion results. EVERYDAY FINANCE TOOLS • Split a bill between people with an optional tip. • Calculate discounted prices and savings. • Estimate fixed-rate monthly loan payments, total repayment and interest. SAVED HISTORY • Keep up to 200 calculation records on your device. • Search results and mark favourites. • Reuse saved calculator expressions. • Copy, share or delete records. • Disable new history saves or clear all history. APPEARANCE AND PRIVACY • Choose dark, light or system appearance. • Enable or disable calculator keypad haptics. • Use all calculator features offline. • No account, advertising or analytics. • Inputs and saved results stay on your device unless you choose to share them. CALCULATION NOTES Percentages divide a value by 100. Scientific calculations use floating-point arithmetic, with displayed results rounded to 12 significant digits. Age calculations use the Gregorian calendar; 29 February birthdays are observed on 28 February in non-leap years. Loan estimates exclude fees and may differ from a lender’s repayment schedule.