Postcron is a web-based tool that allows users to schedule posts across multiple social media platforms from one centralized location. It supports Facebook, Twitter, Google+, LinkedIn, and Pinterest. To use Postcron, users first create an account and connect their social media profiles. They can then compose posts with text, links, and images and schedule them to be published immediately or on specific dates and times in the future. Postcron's interface makes it easy to manage social media publishing across several networks simultaneously.