Certain features only available logging in from a pc. Such as show online status. Thats BASIC. Should.be able to do in app. The worst thing is that many matches havent signed on for days or weeks so if you send a message...nothing. THEN on top of that, even with active users that are good matches according to eharmony's match algorithm the response rate is very low. Ive sent 100 messages or contacts for every 1 person i actually exchange message with. Then those don't even make it to a date.