Switcher: Unit Converter

Switcher converts a value into every unit at once. Type a number once and read it instantly in every unit of that quantity. No picking a "from" and a "to". No tapping back and forth to check a third unit. Change the source unit and the whole list recalculates in place. 233 UNITS ACROSS 20 QUANTITIES • Physical — length, area, volume, angle • Mass, weight & force — mass, pressure • Motion — speed, acceleration, duration, frequency • Energy — energy, power, temperature • Electricity — current, charge, potential difference, resistance • Concentration — density • Fuel — fuel efficiency • Data — information storage BUILT FOR PEOPLE WHO WORK IN UNITS Length runs from megameters to picometers, and on to light years, parsecs and astronomical units. Frequency runs from terahertz to nanohertz. Data covers every decimal and binary unit from bits to yobibytes. Nine temperature scales, not two: Celsius, Fahrenheit and Kelvin alongside Rankine, Réaumur, Delisle, Newton, Rømer and Leiden. US and imperial measures are kept apart, not merged — US gallons and imperial gallons, US pints and imperial pints, miles per US gallon and miles per imperial gallon. Conversions are computed with Apple's Foundation measurement system, so results agree with the rest of your device rather than a hand-typed lookup table. SWITCHER PRO — ONE-TIME PURCHASE Every unit is free. Pro adds the things you need when units are your job: • Scientific notation — read a result as 3.24E-17 instead of a row of zeros • Precision control — significant digits or decimal places, from 1 to 12 • Your own units — define a unit Switcher doesn't have and use it like any other • Favorites — pin the units you reach for to the top of any category • iCloud sync — your units, favorites and settings on every device One purchase covers iPhone, iPad and Mac. Not a subscription. DESIGNED FOR APPLE PLATFORMS • A real Mac app with a resizable, column-aligned results table • Sidebar navigation on iPad and Mac • Written entirely in SwiftUI — no web views, no wrappers • Numbers formatted for your region's grouping and decimal separators PRIVATE BY DEFAULT No account, no sign-in, no analytics, no ads, no trackers. Conversions run entirely on device, so the app works with no signal at all. The only things that ever leave your device are your own favorites, custom units and settings, synced through your personal iCloud account — and the App Store purchase itself.