It works in complete harmony with VIP4. You can share your flat plans and pages between VIP4 and Cito Publish seamlessly.
What is more because its completely HTML5 it works on an iPad or any other tablet.
ViP4 will continue to be available until 2020 when we will ask any remaining users to move over to Cito Publish.
As well as adding all the features in VIP4 we will be adding great new features
...all coming in the next few months