Free to download. Conversion app for every unit.
Free on iPhone and Android, no account, works offline. Pick your store below and download: conversion app, calculator and currency converter in one.
Before you download: conversion app checklist
The App Store and Google Play list dozens of converters. Before you install one, check three things: does it work offline, does it show every unit at once, and does it ask for an account? This free conversion app answers yes, yes and no.
Install takes a few seconds and nothing is needed after that: no sign-up, no email address. The 372 units in 46 categories work offline from the first launch, and 163 currencies update at live rates whenever you have a signal, then keep the last sync when you lose it.
The calculator sits in the input field, so 2×125 g or a hotel price split three ways is one line, read in every unit at the same time. Decimal precision is yours to set, from a recipe to a currency.
Inside, the categories cover a whole day: length, mass, volume, temperature, speed, area, cooking, fuel, pressure, energy, data and time, plus currencies. The flour chart turns cups into grams, and the oven screen gives °F, °C and gas mark side by side. A luggage limit or a screen size in inches is one tap away.
Unit conversions need no connection at all, so the app keeps working in airplane mode, in a basement shop or on a hike with no signal. The only thing it fetches online is the currency rates, and it remembers the last ones it saw.
Same app, same features on both phones, free on each. Tap your store, download: conversion app ready before your next recipe, trip or shopping list.