Gears is the best iPhone App for Steam Community access on the go!
View anyone's profile and activity with Gears!
Gears features an easy to use interface seperated into four main sections:

Profile

• Steam Nickname
• User Avatar
• User Location
• Online Status
• Bi-Weekly Gameplay Stats

Friends

• View Your Friends
• View Your Friend's Online Status
• Automatically Updated
• View Online Friends At A Glance

Games

• View Your Games
• Bi-Weekly Gameplay Time
• Access Complete Game Information
• Purchase Games On The Go

Search

• Search For Old Friends Or Enemies