What do you want in a calculator? Clean, easy-to-use interface. All the features you need, but not cluttered with extras you don’t use. An opportunity to catch mistakes and correct them. That’s what you get with twoCalc. Even better, your calculations are stored on an internal "tape" and you can recall a previous formula or result from the tape or even send the entire tape via email. With twoCalc you get all the features you need: * Large easy-to-use buttons * Audible & vibrate feedback * User-selectable colors * Adjustable font size *Edit your formula if you make a typo * Calculator “tape” that stores your calculations * 10 number memory * Simple unit conversions * Common scientific functions * Operators evaluated in proper precedence order * Adjustable number of decimal places * Commas optionally shown in the result * For programmers: hex and binary modes and two’s complement negative numbers * Re-assignable function keys ++++v1.5 adds fixes for webOS 2.0 and also fixes a bug with editing long formulas. May also improve responsiveness on earlier versions of webOS as well.