When you register with happn via Facebook, some of your photos from there will be imported into your profile. If you register with your phone number, you will need to add a photo.
Editing your photos is simple: tap your profile picture and click "Edit". In the lower right corner of each of your photos you will see an "X" button that allows you to delete them. In the empty spaces, the "+" button allows you to add (and crop) photos directly from your cell phone, camera, Facebook or Instagram account.
Don't forget: your first photo must show your face. This helps confirm the authenticity of your profile and reassures other users about who you are. So smile and say XIS! 😃