Phase Calc for iPhone is a powerful but simple calculation tool designed for electronic engineers who work with 3 phase systems. Calculating the symmetrical components of an unbalanced 3 phase system can slow down 3 phase analysis. This calculator tool uses the powerful iOS structure to compute 3 unbalanced phases into the resulting sequences. Phase Calc can compute phase to sequence and also can compute sequence to phase. Polar and rectangular forms are accepted. After calculation, the Phasor diagram can be viewed if an internet connection is available.