Author do realized that more than half of the world's population are still using outdated low cost Android phones thus using web technologies is just not possib

Author do realized that more than half of the world's population are still using outdated low cost Android phones thus using web technologies is just not possible. For example, I had a project last year where the app will communicate via Bluetooth to a portable printer to be used for the factory workers. I'm not sure if the web technologies can handle this.