Hi
I alreday developed many apps like your requirement. Recent we developed an apl for Infallible pharma pvt limited and we also developed a software for Hp petrol pumps and Bharat petroleum which are running sucessfully in Chandigarh, punjab and jammu.
For your we will develop an admin panel from where you can add categories, add products, view users order, view users ,send notification , etc.
One app for delivery boy where he can see assigned orders and then complete that order and view that order in his history.
One app for user to login, view categories, view products or medicines, add to cart, place order, view order history etc.
Plz discuss. We developed many softwares or apps like that so we know how it will actually works and we will develop it in genuine cost that i mentioned. For good product that cost i mentioned is exact. Rest therr are many developers who will develop this within 25 to 30k. But we already developed so we know the acutall cost and time for good product. Because this app will become your good product and all your earning will on it. So plz discuss if you have any query.