iOS Previews and Screenshots

I am looking for a freelancer who can help me generate customized preview images and screenshots for my iOS app. I have existing screenshots that can be used as a reference. The ideal candidate should have experience in designing iOS app previews and screenshots that match the app theme. The preview images should be customized to match the app theme, and the preferred style is a combination of minimalistic and bold and colorful. I need 5 preview images for my app.

The image size
iPhone 5.5" and 6.5" Display