EDGARROJAS

The only wordpress invoice system that has its own android app so you can create invoices in your computer or directly using your phone.
Features 
* Client, services and invoice management 
* Create invoices in your computer or in your phone 
* Email the invoice to your client 
* PayPal support (so your clients can pay you using your site directly)
How to use this plugin 
1.- Install this plugin 
2.- Install the app “Invoice For WordPress” in your phone: https://play.google.com/store/apps/details?id=com.rednao.invoiceonthego 
3.- That’s it!
Features
<ul>
<li>Create invoices and services.</li>
<li>Manage clients</li>
</ul>

Invoice On The Go

Create invoices anywhere (and in seconds) using your phone!

Invoice On The Go vs Sliced Invoices – WordPress Invoice Plugin