x-Calculator

One calculator for every kind of calculation — from everyday arithmetic to engineering formulas and professional financial analysis. Eight modes, one app, completely offline. EXACT WHERE IT MATTERS Money is computed in precise decimal arithmetic — never floating point — so ₹1,000 crore is as exact as ₹10. Rounding is explicit (half-up, bankers', up or down), and every financial result lists the conventions it used: compounding, payment timing, day-count. The calculation core is verified by unit tests against published reference values. EIGHT MODES • SIMPLE — everyday arithmetic with live preview, undo/redo, memory keys, and percentage that works the way you expect (200 + 10% = 220). • SCIENTIFIC — trig, logarithms, powers, roots, factorial, constants (pi, e, phi), degrees/radians/gradians, and a 2nd-function layer. Errors are named and positioned — never NaN. • FINANCIAL (Pro) — 15 calculators: - Loan / EMI with the full amortisation schedule, exportable as CSV or PDF - SIP with annual step-up, Investment Growth, Future & Present Value - Simple and Compound Interest with effective annual rate - NPV, IRR and XIRR (Actual/365) cash-flow analysis - Retirement corpus and required monthly investment - CAGR, Inflation, and a 3-mode Percentage calculator • ENGINEERING (Pro) — nine solve-for-the-unknown forms in SI units: Ohm's law, electrical power, series/parallel resistance, frequency ↔ wavelength, force, pressure, energy, torque and fluid flow. • PROGRAMMER (Pro) — BIN, OCT, DEC and HEX with bitwise AND/OR/XOR/NOT and shifts, all bases updating live. • STATISTICS (Pro) — paste any data list and instantly get count, sum, mean, median, mode, quartiles, range, variance and standard deviation. • DATE & TIME — differences between dates, business days, add or subtract periods. • CONVERSION — length, mass, temperature, volume, speed and more. PRIVATE BY DESIGN No account. No ads. No analytics. No network access at all. Your calculations and history stay on your device — export them as JSON or delete everything, any time. BUILT FOR iPHONE AND iPAD A dedicated sidebar layout on iPad, full hardware-keyboard support, Dynamic Type, VoiceOver labels on every key, and haptic feedback. FREE AND PRO Simple, Scientific, Conversion and Date & Time are free forever. One-time purchases — no subscription — unlock more: • Financial Pro: all 15 financial calculators • Everything: Financial plus Engineering, Programmer and Statistics, including every future calculator HISTORY THAT WORKS Every calculation can be saved, searched, grouped by day, reopened with its original inputs, and shared. Questions or ideas? support@aidigiapps.com — we read everything. Note: results are for information only and do not constitute financial or engineering advice. Institutions may apply different rounding or conventions; each calculator shows its assumptions.