eharmony is a long-time player in the online dating game, and the first service to push an algorithmic system to try to make the best possible dating matches for its members. Once you create an account, users go through a "Relationship Questionnaire" to create a personality profile that helps match you with other users that eharmony thinks you'll click with. Every day, the app will provide you with a selection of matches and your areas of compatibility; you'll have the option to connect if the interest is mutual.

Premium subscribers get expanded matching and discovery options, and other features like being able to see who has recently viewed your profile.