If you're wondering how to tell if someone is active on POF, there are a few things you can look for. First, check their profile. If they haven't logged in recently, their profile will say inactive. If they have been active recently, their profile will say online now. You can also check when someone was last online by looking at the date next to their name in the search results. Finally, you can send them a message and see if they respond within 24 hours.