REUTERS -- Yahoo has launched Personals Premier, a premium online dating service aimed at attracting serious relationship seekers with deeper pockets. Yahoo's new premium service costs $34.95 a month and features searching and matching technology that uses results from relationship and personality tests. Yahoo's existing personals service costs $19.95 a month. eHarmony visitors are much more likely to be in the age range of 25 to 34 while Yahoo's visitors are older or younger -- with lower incomes. Yahoo Personals is #1 in the online dating category with about 21% of the market, EHarmony fourth with about 6%, after Match.com and American Singles, Hitwise reported.