https://thenextweb.com/security/2018/07/09/timehops-database-breached-compromising-data-of-21-million-users/

Timehop, an app that resurfaces your old photos and posts by connecting to your social media profiles, revealed that its cloud computing environment was hacked and the data of 21 million users was stolen on July 4.

The stolen data comprised mostly of user names and email addresses. Of the 21 million compromised user data, the phone numbers linked to 4.7 million accounts were also stolen.