Once you've got your invoice ready to go, you can send it straight to your client by email through the app.
You can either add your client's email when you create your client at the start of the process, or you can add it at the final step when you send them the invoice.
You can edit the subject and message for the email too. We send the email without any fancy design or anything, so it looks like it's just coming from you directly. If they reply to the email, it'll come straight to you too.
Here's a quick demo of sending an invoice: