I have tried to explain the requirement with screen shots in attached document. This is draft version of requirement. This can be modified if we come up with new or different idea in our discussion.
Basically I am looking for a shopify App which help to fetch all the products and its corresponding details listed in a shopify store. Owner of shopify store will install this App on its store.
As soon as App will be executed, all listed products and its related information should get transferred to a web page on a website.
Product information can be modified at website and changes can be saved back to shopify.
There will be another web page, where user will enter its shopify store name and clicking a button should hit the shopify login page; successful login should ask user to install above mentioned shopify App which further will fetch products information from store and transferred to a web page as mentioned above in para two.
Please let me know the cost and timeline to develop this.