Graphic Design for

We have a corporate app that allows a user to jump to videos, articles, images etc for different products all within the app. The app is functionally ready but is boring looking - we are looking for some help with some really sleek, professional, sexy designs that are great to look at but stay within the branding guidelines that we will share. There are specific colours, fonts, and design elements that need to be used. There are about 15 screens in the app but generically the assets that need to be designed are: 1. Cover screen of app 2. Home screen icon for app 3. Menu panel 4. Buttons with icons 5. Player frames for videos 6. Tabs 7. Pop-up screens The most important requirements for us on this project are: 1. Ability to work on corporate designs while keeping branding and requirements in mind 2. BEING ABLE TO GET A "WOW" EFFECT ON THE DESIGNS. THE APP NEEDS TO LOOK REALLY ATTRACTIVE (WITHIN THE BRAND BOUNDARIES) 3. Being responsive and easy to work with 4. Offering a great price This is the first in a series of similar design projects so we are looking for someone (or a company) that can really produce great design work