CRM/ Invoice Management Invoice Manager is a PHP based web app to manage your Invoices, payments, quotations, customers. You can call this open & responsive invoice management solution. User Interface is very easy and simple. There are 3 user levels, admin, sales and view only. Reports including Daily Sales, Monthly Sales and Custom search invoice/payment reports. Settings menu to change logo sand update other settings easily. This is fully responsive web app utilizing the power of CodeIgniter and Bootstrap.