Android Applications are created for the Android operating system. Applications are usually developed in Java programming language using the Android software development kit (SDK), but other development environments are also available.
IOS Applications are created for iPhone and iPad. Language used is swift and apllication is distributed on Apple Store
Web Application Web application (offline/online) Computer Programs which allows website visitors to submit data to a database or retrieve data from a database over the internet using web browser, the data is then presented on browser as information is generated dynamically