Q: Is there an app I can get for my iPhone that will actually let me walk around and measure the strength of my Wi-Fi network in various parts of my house? I’m trying to figure out the best place to put my Wi-Fi router and the normal Wi-Fi indicator on the iPhone seems kind of random to me. - Ken A: Unfortunately, Apple doesn’t allow third-party developers direct access to the hardware in iOS devices, which makes it difficult to develop…