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Snapchat is a photo messaging application for iOS and Android. The main feature of Snapchat is short-lived images - photos sent to another users have a time limit before it is automatically deleted, known as "snaps". Snaps can be send to private users or the public. One snap per-day can be replayed for free. Additional replays need to be purchased. As the popularity grew over the years, Snapchat now publishes contents for brand networks and live events like sports and music.