PCalc vs Units Plus Converter

PCalc is the powerful choice for scientists, engineers, students, programmers, or indeed anybody looking for a feature rich calculator. It includes an optional RPN mode and multi-line display, a choice of button layouts, an extensive set of unit conversions and constants, a paper tape, multiple undo and redo, engineering and scientific notation, as well as support for hexadecimal, octal, and binary calculations. Includes an Apple Watch app, so you can calculate on your wrist!

SWAP units by pressing button on keypad (lower left) OPTIMIZED for iPhone X, XS, XS Max, XR, 5, 5S, SE, 6, 6+, 7, 7+, 8, 8+ OPTIMIZED for iPad Pro 12.9 (1st, 2nd, 3rd gen), 11, 10.5, 9.7, Air, Air 2, Mini (2nd, 3rd, 4th) iPad Split View supported. ***Now with LIVE Currency Updates for all major currencies in the world*** Very simple and beautifully designed unit converter with 12 categories and many different units: CONVERT: *Area *Currency (155 world currencies updated every 15 min.) *Data-computer data (byte, kilobyte, megabyte, etc.) *Fuel-milage *Length *Power *Pressure *Speed *Temperature *Time (days, weeks, hours, etc.) *Volume (dry and wet) *Weight-mass Currency exchange rates are downloaded every 15 minutes when app is open. Every download uses very small amount of data. Around 1-2kb. Internet connection required. 155 currencies available - This is all world currencies with their respective country flags.