Sarahah, the third-most-downloaded free app, crawls users phone contacts with emails and phone numbers and stores them on its servers. Released only a few weeks ago, Sarahah already has 18 million downloads and has become popular in the US, UK, Australia and Ireland. For now, the app has no feature that would require access to a users address book. Creator Zain al-Abidin Tawfiq replied on Twitter that the app does indeed ask for contacts for a planned find your friends feature”]