May I suggest you try the Authy[1] app for your phone. Its much prettier than GA, has a PIN screen lock, and can save your encrypted credentials in case you lose your phone. Plus, if you run OS X it will sync to your computer's clipboard via Bluetooth.
While this is cool, I don't think I can replace GA with this because GA is the one implemented by the services I use, yeah? I can only use this for services that implement this.
[1] https://www.authy.com/