Google has long provided the URL shortening service goo.gl. Users are able to log in to the site, paste a long URL and have it shortened by Google. On top of the URL being share friendly, Google would also provide analytics detailing who is actually clicking on the link.
Early this week Google released an Android app for the service, taking link shrinking and tracking mobile.
The app is free and can be downloaded from the Google Play store here.
There are plenty of options for link shortening, with most social networks doing this on your behalf, but by using Google's service you're able to see how effective your posts are. And with the Google URL Shortener app installed on your Android device, you'll no longer have to wait until you sit down at a computer to shorten or check on a link.