Hello! Do you have sketches of your app or just an idea in your head and you're ready to take it to the next level with high-fidelity, beautifully designed screens? Great! I'll just need what elements go on each screen (form inputs, images, etc...) detailed out in a document in order to get started. If you need help with this, I will offer minimal consulting on helping you figure that out. You'll get up to 10 screens designed that match your needs and be able to submit revisions. You'll get these designs in the file formats outlined (.sketch is not listed but it is my preference for design software so please let me know explicitly if you prefer this as well) – and I can work with you to figure out which ones you need if you aren't quite sure.
If you have an app you need designed with requirements for each screen and a basic flow mapped out.