Ionic is an open-source SDK for building hybrid mobile apps using web technologies like HTML, CSS and JavaScript. Hybrid apps have the native features and performance of apps built for iOS and Android, but can be written once and deployed across platforms. Ionic makes it easy to create high quality hybrid apps that work on any device. Developers need to install Node.js, Ionic, and a code editor like Visual Studio Code to begin building an Ionic app using Angular or other frameworks. The app can be published using Cordova or Capacitor.

1. IONIC[Framework]
 Ionic is a complete open-source SDK for hybrid mobile app development.
 Ionic makes it easy to build high-performance mobile and Progressive Web Apps (or PWAs)
that look and feel beautiful on any platform or device.
 Write once, run anywhere (Android and IOS)
 Hybrid apps run in a full-screen browser, called a webview, that is invisible to the user.
What is a hybrid app?
Hybridapps are native apps.They’re downloadedfromthe platform’sappstore ormarketplace and
offerthe same native features,offlinesupport,andhardware-basedperformance accelerationasany
app builtwithanative SDK.
The keydifference isthathybridappsare builtusingopenwebtechnologieslike HTML,CSS,and
JavaScript,ratherthan the proprietaryorspecializedlanguagesusedbyiOS,Android,andothers.That
meansanyone withamodernwebdeveloperskill-setcanbeginbuildinganappusingthe hybrid
approach.

3. For installingIonic
Install NodeJS
Node.js is an open-source, cross-platform, JavaScript runtime environment that executes
JavaScript code outside a web browser.
Install IONIC
Framework to build Hybrid Apps.

4. Install Visual Studio Code
Visual Studio Code is a code editor redefined and optimized for building and debugging
modern web and cloud applications
Angular- Web framework
Angular, React, Vue, or even no framework at all with vanilla JavaScript.
Angular is a TypeScript-based open-source web application framework
ionic database
For Publishing
Cordova or Capacitor
References
https://ionicframework.com/docs
https://ionicframework.com/docs/api/select