Recommendation on App Structure - Separate App or not

It depends how big you expect it to get and how many different roles you have at your company. An app I work on currently has almost 100 roles in it because it was never split and has grown into a monster. We are currently trying to split parts off into their own app because of this. It is very difficult to do this at this point but it just needs to be slowly done. It is a nightmare trying to navigate all the different form rules for all these roles. They don't all work in the same place but there is a lot of shared work in here.