This app is Pro version of the Formable Calculator.New features?Variables can have a arbirary-length name. ?Define Functions?Multiple Output for Variables?Reorder Functions/VariablesCharts:You can use variables and functions in Line and PointNote:Pro version has no edit buttons. Instead, use flick to right on variable buttons.Variables and Functions are defined up to down.You can use a global variable in functionsblog:http://formable-calculator.pubreed.com/Historyv0.2.0: Added Charts.v0.1.6: Preference for setting keyboard height. Fixed the cursor invisible bugs for Android4.x Now available on Android4.1v0.1.5: Preferences for showing variable value by default v0.1.3: add Edit button for variables and functionsv0.1.0: Variable name automatically change when addv0.0.9: Introduced new syntax parser.v0.0.7: Fixed precision error.v0.0.5: Change base of Log to 10.