I can build up a native app where with the following qualification.
>>Gmail Authentication
>> Sign in
>> Sign Up. While signing up we will take delivery address details once. Based on it we will give delivery time slots
>> Profile update
>> Account blocking feature
>> Push notifications
>> Dynamically adding categories
>> Dynamically adding products
>> There should some restriction to the user to add max 5 qty of products
>> For some categories of products, there should some extra checkbox
>> For some categories of products, there should be a combo box with 100grams, 200 grams, 1kg
>> Delivery times maintained
>> Different delivery time slabs displayed different for different address. This will be controlled from the server.
>> Payment types
>> Paytm
>> PayPal
>> Woocommerce integration