All in One Smart Calculator

Simple to use, with every function you actually need — everyday math, real formulas, a math workbook, unit conversion, and itemized quotes you can send as a PDF. ■ Calculator • Arithmetic, percentage, sign toggle • Scientific functions (sin, cos, tan, log, ln, √, powers, π, e, parentheses) in degrees or radians • Memory keys (M+, M-, MR, MC) • See the result before you press = ■ History and favorites • Saves up to 100 calculations automatically • Star favorites, add a memo and search by memo or amount (Pro) • Export as text ■ Math workbook (new) • 160 middle and high school problems in four topics: linear equations, quadratics, Pythagoras and trigonometry, probability and statistics • 25 problems per round, multiple choice and written answers mixed, graded all at once at the end • Tap a missed problem to see the steps • On supported devices, Apple Intelligence explains the steps in plain words, on device ■ Formula book (interactive) • 81 formulas across geometry, finance, trigonometry and algebra, physics, and astronomy • Enter values and it calculates on the spot • Each formula has a how-to sheet and its history • Formula quiz with three difficulty levels ■ Handy tools • Fuel economy and cost — km/L, L/100km and MPG (US/UK) side by side, plus cost per distance with a round trip switch. EVs too • Discount, tip, and split the bill (share the result in a message) • Unit price — compares two products per 100g, 100mL or item • Stock averaging — new average price and gain/loss • Ovulation — fertile window and next period (nothing is saved) • Scan and sum — reads numbers from a photo and adds them up, on device • Unit conversion, time zones (50+ cities, DST handled) and date calculator • Open tools from Siri, Spotlight and the Shortcuts app ■ Quotes and invoices • Rows sharing a tax rate are grouped into a subtotal (2 rows free) • Rounding applies once per rate subtotal, so the total always agrees • One-page PDF — quote, invoice or receipt with date, issuer, recipient and registration number (preview free, export with Pro) ■ Tools by country (Settings > Region) Your country of residence is separate from your display language and decides which tools appear. • VAT and GST — 9 countries (China, Germany, Spain, France, Italy, Netherlands, Belgium, Austria, Singapore), two-way net/gross • Stock sale tax — Korea, Japan and China. Enter the sale and cost to see the tax and what you keep • Japan — consumption tax, simplified taxation, invoice transition relief, the 20% special rule, resale profit, simple inventory, and six payroll tools including take-home pay, social insurance by prefecture and the furusato nozei limit • China — social insurance and housing fund, take-home pay, and year-end bonus tax comparison • Korea — net salary, the four major insurances, severance pay, VAT, compound interest and annual leave • Each tool explains how it calculates and what it leaves out ※ Results are for reference. For actual filing and payment, please consult a tax professional or your national tax authority. ■ About Pro • The calculator stays free — arithmetic, scientific functions, memory, history and themes • Tools, country calculators, the formula book, the workbook and photo math open with one purchase (not a subscription). The workbook lets you try 3 problems per topic for free • No ads, even in the free version ※ If you downloaded this app before Pro was introduced, your Apple ID keeps every feature free ■ Built to be easy to use • Thousands separators as you type (100000 → 100,000) • Dark and light mode, seven accent colors • Works on iPhone, iPad and Mac, with hardware keyboard support • 9 languages, following your system or switched manually in the app ■ Private by design • Every calculation happens on your device — nothing is sent anywhere • No network requests, no tracking, no ads, no permission dialogs • Everything works offline A simple look and solid functions, for the small calculations you do every day.