App and Web for Healthy Groceries Marketplace

I need to develop an app, and web, that is a marketplace for natural groceries and greengroceries. It must be easy to access and use, user friendly. With images and shopping cart. It must be an app with two parts, one for the client and the other for the seller, who can manage their sales through it. The client will have a profile, cart, previously placed orders, a list of products to order. Receive confirmations of their orders. Clients must be able to observe the available locals, by proximity and by type. There should also be a space for offers, list of purchased products, list of future shops and a price comparison for the same product in different locations. The customer places the order, pays (market payment, transfer, cash), receives a confirmation message that the order was accepted, another message of the time when he can pick it up, and another that it was delivered. Products must have unified photos (the same product photo in all locations), be classified by category, have a description, price, quantity (units, Gr., Kg, ml., Etc.), Stock available, possibility of offers and discounts. On the seller's side, they must have: Profile, Available stock (low stock alert), Orders received, Withdrawal schedule, Possibility of delivery, delivery schedule, Sales made, main products sold, main customers. Seller should receive notification of an already paid order, confirm the withdrawal/delivery schedule and confirm when it has been delivered. The products are pre-loaded, the seller selects them and loads stock quantity, price, available discount, you can also add products (such as packs) with the prior approval of the administrator. A % of the sell must be detailed as service fee, but only for the seller. Category: Programming and Technology Subcategory: Programming Apps. Android, iOS and others What is the scope of the project ?: Create a new application Is it a project or a position ?: A project I currently have: I have the specifications Availability required: As needed Required platforms: Android, iPhone I need: Create an app App type: Virtual store Need backend: Yes Payment processor: Yes