This document discusses the Pebble smartwatch app store and developing apps for the Pebble. It provides instructions on setting up the Pebble SDK on a local machine. It also announces that the Pebble app store will be shutting down on June 30, 2018 and encourages developers to publish their apps before then. The document shares a tennis tracking app called Pebble Tennis Plus as an example and provides a link to its GitHub repository.