First and foremost, I would like to get information about the application requirements by email.
The time and cost may vary depending on the situation.
Every application requires some background resources to function, such as a database, third-party APIs, an API server, and deployment platforms like as (Playstore, Applestore). If I am able to investigate the detailed requirements, I will be able to consult on cost-effective technologies to use for application development. This consultation will be free of charge.
Concerning development, as stated in my profile, I am presently confined to the deployment of Android Application Development alone, but because I develop in Flutter, it can be simply compiled to an iOS application with the assistance of someone who has an Apple system.
As per I understood from you requirements,
You want to develop an product catalogue and a subscription based delivery system.
So you will be needing an admin panel to manage products, users, subscription packages, orders and history
Additionally you will need an payment gateway (stripe preferred) for subscriptions.
I can deliver above within mentioned budget.