Improve IOS application design

I'm an Android developer introducing to IOS development. I'm starting with a small catalog of drugs application as a side project to learn IOS and also make some portfolio for IOS. As a side project, I try to do most of the tasks myself, and I've designed the applications screens and user interaction. But as I'm not a designer it's clearly not a professional job to be used as a portfolio. ********Application description******* The application is a drug catalog where the user can search for all drugs that are sold in Spain by name or barcode. The user can look at drug description, drug alerts, read drug prospectus,... Application screens: (1) Drugs list: Here user see its saved drugs and have a toolbar option to search and add new ones. It is not provided in my design image but the design has to contemplate that drug list can have sections to group the drugs be a family member using them. (2-3) Drug search: The user can search drugs by name or by barcode. (4-5) Drug detail: Drug detail. This is where heavily improving is needed. This screen shows all drug information that contains: * Identification info: name, laboratory, national code * Alerts (optional, some drugs can have several and a lot of drugs will have none): Driving alert, black triangle alert, pregnancy danger, breastfeeding danger, psychotropic, national drug agency alert, especial clinic control, unsold alert, geriatric alert and long duration. It's a big plus to provide an icon to illustrate all the alerts. Several categorized information about drug commercialization, drug active principles, drug packaging format,... * User can add personal notes (6) Configuration screen where user can disable some drug alerts and enter family members I will provide you with my initial design in Sketch 4.1 or PDF. It's not mandatory but it's a plus for me that the final job will be done in Sketch (Put it in your application message) I expect that you in this project to: - Heavily improve the design making it truly professional. Specially Screen 4 - Clean design that follows IOS guidelines and use IOS components. This is very important - Design that adapts iPhone SE, Iphone 7 and Iphone 7 plus sizes - Design an application icon that follows IOS guidelines (app store size, and devices sizes) - All icons or graphics had to be designed to support larger density retina displays Follow IOS guidelines and design of Screen 4 is totally mandatory. But as this is a side project and has low budget I'm open to accepting only partially work (clearly explain what you offer in your application note). As a plus that app will be published in IOS AppStore making nice portfolio for you (I expect to publish in the next 1-3 months)