In both applications players use a GPS-enable smart phone to check in at places of interest, share their location with friends, and leave comments about their travels. They are credited for their efforts with a game-like achievement system that rewards visiting both common and unique locations with a variety of iconic stamps in Gowalla or badges in Foursquare.
Foursquare is appealing to business owners who can capitalize on promoting specials! Drawing new potential customers from competitors.
Gowalla for business not so much, yet.
Which do you prefer? Why?