iPhone and Android VPN_client -- 2

I need VPN client for iPhone and Android that will use the built-in PPTP client to make a connection to our PPTP server. Here are the features needed: 1-User will be asked to enter username/password once the app started. Username/password will be stored in the profile and no need to authenticate again. If a new user, there will be a link : CLICK to REGISTER 2-Registration page will have: username, password, email address, email address verification (will supply) 3- User will enter username and password and will be connected. If trial period or subscription is ended then there will be a link : Click here to renew/subscribe. 4-preconfigure VPNs will be stored and user will have an option to connect to anyone of them. 5- User will be able to connect/disconnect the VPN manually on the VPN page. 6-Connection will stay alive even if phone goes to sleep unless if VPN is disconnected manually or the phone is turned off. 7- About us page 8-You will submit to applestore and google play including icons and everything. 9-I get the source code. 10-I will set 3 milestones. 15% at the initial start of the project. 42.5% after the app is uploaded and tested by me to apple store and Google play. The remaining %42.5 will be paid after I get the source code.