We released version 2 of our free iPhone app The Agilent Microwave calculator. It consists of a Coupler Directivity Error Calculator (useful if you use a VNA), a Mismatch Error Limit Calculator that shows the potential uncertainty in a transmission measurement caused by source and load mismatch, and a handy Ratio-to-dB Calculator for converting dB to power and voltage ratio. It also has a Noise calculator and Antenna calculator.
Besides, it’s cool… in a geeky kind of way… Check it out!
(Compatible with iPhone, iPod touch and iPad. Requires iOS 3.2 or later.)