Those of you with an iPhone probably love the Steam mobile app. On it you can browse and buy games from the store, chat with friends, but as of the latest update you can also do the following:
– Moved invites to a separate screen
– Streamlined interface for responding to friend invites
– Display friend nicknames
– Added iconography to indicate that friends are on mobile or using Big Picture
– Include Facebook suggested friends in invites list
Taking a look at the app on Android the last time it was updated was March 2012. The UI is old and outdated, it is lacking in features, and is likely no where near optimized for the latest version’s of Android that have been released since the apps last update. Hopefully Valve is cooking up a major update soon to coincide with the release of Steam machines throughout 2014.