Cross-Platform Buyer-Supplier Connection App

Develop the MVP of a mobile app that will be supported on up to 10-years old devices of both platforms (Android and iOS) with a simple interface that connects buyers and suppliers:
- user logins to the app with a phone number, email, or Google account - use Google Firebase,
- as a buyer, the user will look for a supplier and vice versa,
- using speech the user describes what he is looking for and app shows the most relevant offers (without a recommender system - the app will send a sequence of API requests to the GCP and show a list of received responses)
- user can delete some elements from the received list or highlight them with an asterisk
- in the response, user can see the contacts of the counterpart and can click the phone number to call or e-mail to write a message,
- user can send once again previous request and get a new list
- user needs credits to make a query.
- the user can get credits by:
-- load account with a credit card
-- rate his counterpart
-- recommending the app to a colleague
-- get a gift
-- fulfill the survey (e.g. relevance of the delivered offers)
- the app should be multilingual
- Flutter for both platforms (Android and iOS)