The Federal Communications Commission is investigating at Apple’s block on the Google Voice app.

Google Voice lets people pick a new phone number, then route incoming calls to cell, office or home phones. It also lets users place calls, including international calls at low rates, from within the application. IPhone owners can still use a Web browser version of Google Voice, but its features are limited.

Furthermore, Apple’s also rejected Google’s Latitude iPhone app, a map application that lets people share their location with friends, which, according to Google, had the potential to replace Apple’s own maps program or “create user confusion” over the two companies’ programs.