Sling by Gangverk (private company)

Sling, developed by Icelandic app studio Gangverk, is a shift scheduling and communication software for retail and restaurants. Built around four main features: shifts, tasks, messages and newsfeed, it allows managers to organize all aspects of their work on a single platform.

Sling is a free app is available on the web, iOS and Android, and was released in June 2015.