They could also be using information you simply wouldn’t know.
While websites like eharmony and Plenty of Fish give you the option to answer questions about your personality and interests on a sliding scale, gives you predetermined interests to choose from.
Many sites and apps (like Tinder) only allow people to see each other based on location and mutually matching search criteria (like age and sex).
To search these sites, you may need to alter your profile to match your sigifigant other's potential search preferences.
Match.com, like most online dating apps, seems to have followed after Tinder by letting users view other profiles and say yes or no to them by swiping right or left.
The app stands out because you can create a “story” similar to Facebook or Snapchat for users to see what you’re doing throughout your day.