In order to use the Android or iOS app for
Blue Iris you first have to install and run an instance of Blue Iris on a Windows machine. Do you have this running on Windows already?
If you do have this already setup, you have to configure some things in the Blue Iris software prior to using the phone app.
First thing to do it create a user in the BI server - Blue Iris Options > Users > Add
Then enable the web server from BI server - Blue Iris Options > Web Server > Enable
From the web server page you can see the IP address information for your server that you will need to enter into the BI phone app.
From phone app add new server:
Local server address = LAN IP address found on BI web server page
External server address = External IP address found on BI web server page
User ID = one you created earlier (case sensitive)
Password = one you created with user account (case sensitive)
Edit: I forgot to mention that in order to access your camera outside your network through BI app you will have to port forward the port specified on the BI server under Blue Iris Options > Web Server > Enable the HTTP web server on port #