Whmcs client area APP for Android & ios

our company needs to have a mobile application for our clients We are using WHMCS and client area application should communicate with WHMCS API, We prefer to choose an interface with we can deploy IOS with xCode and Android with eclipse. here is some features we need to have in this app: See overview of how many services they have, open tickets, due amount, credit amount, etc. See list of products they have Open, view, reply to the tickets View invoices and pay the invoices Adding new order in app payment gateway ( Paypal,Credit Card ) Push notifications(on invoice created, invoice payed, service suspend and unsuspend) MailBox (to view list of emails which is sent to client). The programmer should be familiar with WHMCS as administrator. We need to be able to customize this app anytime we need and change and update the screens and add extra languages to this application . in default it wil work with ENG language We also want to source codes