Reminiscing about years gone by is suddenly much easier for Android users. Timehop, the service that travels back in time to display your old social network updates, is now available for Googles mobile OS. It launched way back in 2011 for iOS, so the Android version has been a long time coming. If youve never used Timehop before, it collects all of your Facebook, Instagram, Twitter, and Foursquare content and replays your life by showing you what you were doing a year ago on any given date.