You can easily create an invoice in Akounto with following steps:
・Click on Sales → Invoices → create new invoice
・Select a customer
・Select an invoice date and due date
・Add item, quantity, price, discount and tax
・Click 'Save' and cross check, if everything seems fine, ‘Approve’.
Your invoice is created within minutes, you can send it to your customer right away without having to login to your email separately.