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This calculator can be used not only in scientific notation(e.g. 1E-6) but also using engineering multipliers(e.g. p,n,u,m,k,M). Features - Calculations History and reuse it - Calculation history is automatically saved when exit app,can also scroll. - Can use engineering multipliers,6 Special buttons - Four user-defined constant - Four interactive variable - Three buttons can be insert formula - interactive variable can have alias - Functions: √,log,ln,sin,cos,tan,sinh,cosh,tanh,asin,acos,atan,asinh,acosh,atanh,e^x - Built-in Constants:π,bk,q,e0 and Operator ^ - Autocomplete parentheses - ON/OFF function key click sound - Mail transmission function of the calculation history - Built-in Online Help Viewer - Universal App There are also "e-calcFree" feature limited edition.
