On-demand services seem like something that only became possible after the explosion of smartphones and the opening of digital spaces for business. You need to be corrected. You’re mistaken. Since ancient times, on-demand services have been available.
On-demand service is any business or store that provides its product or service at the customer’s request.
To read more:-
https://foxdenlane.com/build-a-better-world-with-on-demand-app-development/