Energy Droid is the perfect invoice maker specially designed for electricians who need a simple and professional mobile invoice app. Create, modify, print, send and track invoices and estimates (professional PDF) easily on your phone or tablet. Manage all of your billing while on the go so you can get paid faster. Send the estimate or invoice before you even leave the customer! The free version of Energy Droid can be used to create a limited number of invoices/estimates. You can buy extra doc