Hi, If you read this description,I hope you'r a android or ios app developer.I am also a android app designer and developer.So I know when a developer start her app business when he/she face a big problem,that's problem is design.Though you have good knowledge of programming and also expert in java or c#,but steel need a good design.Because you app will look ugly,user don't use your app,You can ensure it,Because I face same problem,Now I have enough knowledge of design.So I want to help you.I will show my some design if you can plz see my design.
Which you will get this gig:
720*1280 or 1280*720 PSD,
same size jpg and png file
Note:if you will not satisfy my design I will back your $.But I hope it not possible.