This article discusses the top 18 mobile app development frameworks that can be leveraged to build scalable mobile apps, providing a consistent experience across different platforms. These frameworks include Flutter, React Native, Xamarin, Apache Cordova, Ionic Framework, NativeScript, Solar2D, Titanium SDK, Node.js, Sencha, Uno Platform, Framework7, Dart Native, Kotlin, Kendo UI, Onsen UI, Kivy, and Quasar Framework. The choice of a mobile app development framework depends on factors such as the project's requirements, ease of use, community support, and cost.