Flask is a Python micro web framework ideal for rapidly constructing web applications, offering minimalism, flexibility, and modularity.
Heroku is a cloud platform as a service (PaaS) supporting several programming languages.
Progressive Web Apps (PWAs) are web apps built and enhanced with modern APIs to deliver enhanced capabilities, reliability, and installability while reaching anyone, anywhere, on any device, all with a single codebase.
Python is an interpreted and general-purpose programming language.
React is an open-source JavaScript library for building user interfaces or UI components.