Nick Walter, Swift Course Question, All Platform

Hello Nick,

The course transfers lists between

MacOS computer,
iOS, iPad, iPhone, and
Watch.

Do you achieve this by storing and reading Jaon files by Bluetooth ?
Do you have an interface to a website, or by use of Firebase?

I am a Full Stack NextJS programmer and can store Json locally
and access MongoDB…

How do you communicate the data to each device-computer?

thank you,

James Avakian