Hello Dear, I've read your project summary and I can build an app for both the Android and IOS similar to the Dunzo app in which multiple store should exist, customers can login through their phone numbers and also a delivery section as per your requirements and I am absolutely sure that I can do the project very well. Do you also want me to publish the app on play store and apple store.
Lets have a quick chat to discuss further.
I have extensive experience in designing and development of Websites, Mobile Applications, Management Systems and E-commerce or Online Stores Solutions.
Kindly have a look at my Portfolio and Client's reviews via this link,
https://www.freelancer.com/u/kamran2012
Thanks,
Faizan