"as available" basis. Unlike Tinder and similar apps which shows you all user profiles within a designated radius of your location, Happn takes GPS a little further by showing you all the users you've physically walked past throughout your day. Social life in college: Social life in grad school: Leaving a progress meeting with your advisor in college: Leaving a progress meeting with your advisor in grad school: Your apartment in college: Your apartment in grad school: Drinking coffee in college: Coffee in grad school. But you know, a lot of people think that grad school is just like a continuation of undergrad. Profiles are organized by time and place of your encounter and if you like a user, you can secretly like their profile they won't find out unless there is mutual interest.