You can send emails from the mobile app without any account setup required.
On this pop-up you're doing two primary things, determining who this work order is going to go to, and which version of the work order that person is going to see.
To start with, who the work order is going to be emailed to is very simple, you can select any of the following options in any combination:
The customer's email address (grabbed from the customer associated with this work order).
The office address that you've specified in your notification settings.
The technician email address.
And any number of custom email address that you enter in.
After you've selected who you'd like this email to go to, you'll need to select which "view" this particular person will get.
You can choose the default setting, which you'll find in the notification settings.
You can have everyone get the customer view.
You can have everyone get the technician view.
The main difference between the customer and the technician view, is that the technician view has a lot of information present that normally you would not want the customer to see (i.e. technician notes he's added about a recommendation that the customer ignored or something like that).
After you've select those settings, just click "Send Email" and your invoice will be sent via Profit Rhino's invoice client.