Cross-platform mobile frameworks reduce the gap between development and release.

Developers can build an software that runs on multiple platforms using the same technology.

Flutter SDK

Flutteris an open-source software development kit (SDK) released by Google in 2017.

Flutter website home page

Its used to develop cross-platform apps for Android and iOS.

This is because Flutter comes with Material Design and Cupertino, the design languages for Android and iOS.

Key Features of Flutter

you could start writing Flutter apps by following thisGoogle codelab Flutter tutorial.

React Native home page

React Native apps utilize native platform APIs which give the app a native feel and look.

Key Features of React Native

SeeReact Native’s getting started guideto create your first React Native app.

Xamarin

Xamarin is an open-source platform for building iOS and Android apps with .NET and C#.

Xamarin home page

Xamarin doesnt enforce a one-size-fits-all solution for all platforms.

It lets you use platform-specific APIs to build your app.

Xamarin.iOS allows you to develop iOS mobile apps while you might use Xamarin.Android for Android apps.

Ionic framework homepage

Xamarin exposes all the underlying APIs and functionality of the operating system to the app.

It also compiles all the code into a native binary which gives the app native-like performance.

Key Features of Xamarin

Get started with Xamarin on theMicrosoft Learn platform.

Ionic Mobile Framework

Ionic was created in 2013, initially to help build mobile apps using Angular.

Each of these components follows Material Design and iOS design standards.

Ionic is essentially an NPM module and requires Node to run.

Key Features of Ionic

Visit theIonic framework documentationto start building mobile apps using Ionic.

You may also want to consider the support of the framework.

Flutter, Xamarin, and React Native are backed by large companies.

However, Xamarin is more established and is a better choice for enterprise applications.