Calculator apps are always handy on your phone to do quick calculations on the move. Advanced Calculator is a free tool for Windows Phone 7 and it has pretty good features and also does advanced calculations. The user interface of Advanced calculator is also pretty good.

Features;

• Both Orientations
• Radian mode
• Writing the full mathematical expression and evaluate it at once.
• Power and root
• Log, Ln and Exp
• Trig. function (sin, cos, tan)
• Inverse Trig function (sinˉ¹, cosˉ¹, tanˉ¹)
• Extra helpful functions (abs, floor, ceil)
• Hyp. functions (sinh, cosh, tanh)
• Constants (pi, e)

Download Advanced Calculator using the image below.