Can Ionic encompass multiple Angular apps?

On my Angular webapp right now, I have the main app in the /app directory, the signin and signup apps in separate directories at the same level. If the user in the app is detected to not be logged in, he is redirected to the /signin app.

The general scheme is

myproj
   |- app
   |   |- index.html
   |   |- app.js
   |- signin
   |   |- index.html
   |   |- signin.js
   |- signup
   |   |- index.html
   |   |- signup.js

Note that app.js, signin and signup are separate apps not related to eachother in any way except that they redirect to eachother (i.e. after successful sign in, the signin app redirects to /app.

I'm worried about how this will work when I want to convert this into an Ionic app for mobile. Can an Ionic app contain multiple apps that redirect to eachother? Or does everything in an Ionic app absolutely have to be under one single root app?