Ionic is another cross-platform app development technology that is used to build beautiful and responsive mobile applications. It is an open-source technology known as a software development kit or SDK. This technology lets the developer choose the stack for development such as AngularJS, VueJS, or ReactJS and can be used to develop hybrid mobile applications, PWAs (progressive web apps), and more. Many application developers around the world are using Ionic to build beautiful and appealing mobile apps, and it will be one of the most used app development technology in 2021.