Numerous programming languages are used in the development of mobile applications for iOS, Android, and Windows smartphones. A Windows phone app uses.NET technology, while an iOS app uses Objective-C, and an Android app uses Java or Kotlin. JavaScript has been a promising programming language for the construction of custom JavaScript mobile apps, and it's not going anywhere any time soon. But do JavaScript's effects on the creation of mobile applications resemble those of HTML5? You can build excellent mobile applications if you have a solid understanding of HTML, CSS, and JavaScript. Next, we'll discuss the best JavaScript mobile app frameworks on this topic.