*TL;DR*: As of Feb. 2, you can get a wireless car adapter for either Apple CarPlay or Android Auto for only $68.99 — that's 19%..
Software based personal assistant from Apple Inc.
Siri is a virtual assistant that is part of Apple Inc.'s iOS, iPadOS, watchOS, macOS, tvOS, and audioOS operating systems. It uses voice queries, gesture based control, focus-tracking and a natural-language user interface to answer questions, make recommendations, and perform actions by delegating requests to a set of Internet services. With continued use, it adapts to users' individual language usages, searches and preferences, returning individualized results.