What is the best infrastructure/organization for phone or tablet Forms

Dear team,
Let assume that we would like to implement a solution that consist to start a process with a form fullfield on a phone or on a tablet.
What is the best architecture to do that?
Please also note that the network should be not the same that the connection may be secured.
i do believe that it’s not possible to install an embedded version on a phone or a tablet.

you can submit a form data using rest api also.