Startup Idea: Cross-platform Social Media Posting App

Startup idea to develop a software application that enables multi-platform posting. The app would aim to solve the problem of synchronously posting the same content on Instagram, Facebook, Snapchat, etc, thus saving time and effort.

I have side projects that require posting to multiple social media sources. A big problem which I have encountered is that there is no good existing app that will post to Instagram, Facebook and Snapchat (among others) at the same time. Posting to multiple platforms with the same photo takes time and effort.