Do backend i need to know trip programming knowledge to modify the app? a. Some images from google search some travel find php images from freepik some images from flaticon. You can manage all website content from discount rooms backend & then restful api will transfer data in between app & backend. Message finder room to codeigniter buyer all those features are ready to start & good enough for your full application development & customization. You tour can get hotel all source for both frontend hotels & backend & able to modify whatever you want