What's the best Android app for using a phone or tablet as a car infotainment system in vehicles without Android Auto?

AutoZen is a car dashboard and launcher app designed to transform Android phones or tablets into functional infotainment systems for cars lacking integrated Android Auto. It serves as a practical solution for older vehicles or those without native smartphone connectivity, enabling users to mount a device on the dashboard for easier access during drives. The app features a customizable home screen with large, touch-friendly buttons for safe operation while driving, reducing distractions. It integrates seamlessly with popular navigation apps like Google Maps and media services such as Spotify, allowing quick launches from the dashboard. Users report that the interface is intuitive, especially on tablets, with clear displays for maps, music, and calls. The developer, ZenThek, frequently updates the app based on feedback, and premium plans unlock additional widgets and themes at reasonable prices. However, some limitations include occasional compatibility issues with certain device models and the need for a stable Bluetooth connection for full functionality. In real-world scenarios, such as long commutes or road trips, AutoZen provides a cost-effective alternative to upgrading car stereos, though it relies on the user's own data plan for internet-dependent features.