How to make a mobile application for a working site?

Question

Mobile development

Hello! Tell me, please, is there a working web solution with a database and task scripts?
There is a task to transfer or make a mobile application work in parallel.
Are there constructors similar to site builders to create an application template and embed all the functions of the site there. The user enters data, the data goes to the database and the task is started, the user sees that the task has started, changes or monitors the execution of this task.
It can be to create an api and send data to and from the application through the api. Is it possible to implement this application through some kind of constructor?
Perhaps there are some other ways and is the database of a web solution suitable for a mobile application?