Creating an invoice

To use the invoicing feature, you'll first need to make sure you are using iOS app version 6.1 or higher, and have the feature enabled in the app's menu under `Default settings & features`.

Once enabled, you'll now see two buttons at the bottom of the amount screen: 

1. Invoice — for sending an email and getting paid later, outside of the app
2. Charge — for getting paid inside the app, with a manually input credit card or card reader

There are two ways to total the amount for items you are selling to your customer:

1. Manually type in any amount, and this amount will be the total for the invoice. The invoice will show a single line item for the amount/description.
2. Choose a series of Products from your pre-defined list. These items and quantities will show up on the invoice as line items, with subtotals for each.

Once you have populated an amount, press the `Invoice` button. From there, you'll need to complete a few more fields (Email, Description and Days Until Due) to finalize the invoice.

Pressing "Send Invoice" will automatically create the invoice, with any necessary line items, and instruct Stripe to email the customer at the address provided. The customer will then receive a link, similar to a website to pay, similar to: 

After the invoice is created and sent, you can continue to update it in your Stripe Dashboard at: https://dashboard.stripe.com