No, Plann App and Plann Desktop do not Automatically Post to Instagram.
Facebook/Instagram have announced auto-posting however have restricted this BETA feature to a select few tools.
Unfortuntely Facebook were overwhelmed with applications to join their BETA programme and instead of processing them, decided to turn away off any new applications (including ours), and stopped staffing the partnership team in late 2017.
If we're honest, you'll get better engagement and more reach if you post in real time over a set-and-forget option, because you're there to answer and speak to your people, proving to the platform that you have quality content.
As soon as we get the official go ahead from Facebook/Instagram for an auto-posting option, trust us, you’ll be the first to know.