Styled App Bar - Copy this React, Mui Component to your project

I want to create a mobile app about e commerce. Need to focus on user friendly interface, easy to use, you make a start page, then go to the landing page introduction and have a login button And register, then you make me a main page for users to choose 3 services: cloud, sensor and robotics. Main colors are green #81c408 and white Based on this website. http://roboticsecommerce.wisdombrain.org/