e Harmony uses what it calls "29 dimensions of compatibility" based on a compatibility test.
The algorithm looks at core traits such as emotional temperament, social style, cognitive mode and physicality.
Members have the potential to decline a match, meaning all contact stops.
also offers free viewing of matches, but new users must sign up for a paid plan to email or IM other members.
Users may add up to 26 photos and even import photos from Facebook.
While it is free for new users on e Harmony to view their matches, they must sign up for one of the paid plans to initiate contact wtih other members.
The Premier Plan also includes personalized help from a profile advisor.
Premier Plans are for 12 months at .95 a month or a single payment of 3.40. Standard Plan users can view members, contact members and read email from members.
However, members also have the option of conducting searches on their own based on search filters.
For communication, members may "wink" at others, email or IM.
Members write an open-ended essay about themselves and their match.