Fix ui of mobile app and add push notifications

the mobile app is made in react native u need to fix ui of all the screens to make it more attractive like images are not coming full white space is coming around , fonts overlapping, little designs , font small, some colors like home page, product page, cart page, shopping page, checkout page , payment gateway page and all, information pages, ur orders, my account , all the pages of app
it is Ecommerce App
Push notifications for promotional both ios and android with and without image i will give api, u have to set
and help me in upload app in play store and android