Simple to use. Secure Admin section plus Client login section. Add as many clients as needed. Add as many invoices for each customer as needed. Invoices self total the inputted data. You can search through customers or invoices for keywords. Keeps track of Payments you receive from customers plus Monthly Chart. Automatic Email Paid Invoice system you can turn on or off. You or client can create a clean invoice for printing. 10 separate Items per Invoice plus misc., shipping etc... Auto Invoice due notification every 15 day,30 day and Final notice. Recurring Invoice option that automatically makes invoices for you. Options for using shipping or not, also option to email client or not. PDF invoice view. A language file you can edit to change all words on invoice. Like QTY to Rate etc... Client access log to see if client has viewed invoice. Support forum for questions about script. PayPal Payments you can turn on or off.