Hello Sir,
I have read your requirement and I would like to go further on this.
Let me introduce myself first, I am Angel (skype:project4angel) working as freelancer on Android and iOS. You can see my some of previous projects and review in my portfolio.
Sir, PHP api integration is very easy task and I am expert in UI design, I can provide you solid solution for this.
Sir, I would request you to have some word with me before you award this project to developers.
Looking forward from you.
Regards,
Angel.