Spark 360 is a gaming client for Android and iOS. It's currently available on Google Play, and supports Xbox Live and the PlayStation Network. The app allows you to monitor your achievements, trophies, friends' statuses, and includes many other features, such as trophy/achievement comparisons, messaging (Xbox Live), home screen widgets, notifications, and much more.
Spark 360 is an unofficial application, and not supported, endorsed, or affiliated with Microsoft Corporation or Sony Corporation.
Spark has been translated to Spanish, French and German. Credits:
Spanish and French: Pierre-Alexandre Emmanuelli
German: Quali