Ångström

A unit and currency converter built around one idea: give you the answer in as few taps as possible, ideally zero. Start with the number, type a letter or two for the unit, and the result is already there.

It skips the endless category lists — though you can browse them when you’re in the mood. If a number is on your clipboard, it gets picked up automatically. It learns what you tend to convert and guesses better over time, keeps currency rates fresh, and still shows approximate values when you’re offline. Units, currencies, and timezones, all in one place.