Chatty Cathys beware: There's an app available that shows you how much you're hogging the conversation. 

Install the Talk-o-Meter app on your iPhone (no word yet on an Android version) between two people having a conversation. The app will separate two voices, and at intervals of one, two or five minutes, you see different lengths of red and blue bars that show what percentage of time each speaker was talking. 

The app only works with two people; however, a multi-person version is in the works.