NEW STATESMAN - Feb 13 - A 2016 study found that while Badoo and Tinder dominate the Spanish and English-speaking worlds respectively, countries in the Middle East tended to use localised apps, if at all. Harmonica is Egypt's first mobile-dating app. The idea behind Harmonica is to approach dating in line with local cultural norms. During the initial match, users don't see much. Female users have the option to hide their photos until they've approved another user to view them. Harmonica's users are given two or three matches a day at most, all selected by the app's algorithm based on a mandatory 30-question survey, and users can only pick one with whom to chat. They're then given a seven-day period, before choosing to progress with their partner further or return to the matching stage.