Soulver!

Soulver is a revolutionary calculator replacement app. Its powerful UI lets you do calculations over multiple lines, and use words alongside numbers, so that they make sense. - Do percentage calculations using natural phrases 15% off $350 (has support for 9 different percentage phrases).- Supports over 150 currencies (including Bitcoin), and has a specially designed currency keyboard for quick conversions.- Custom variables across all your documents, and a special keyboard for quick access to them.- All standard math and programming functions, also available on specially designed keyboards.