Which exact tecnology to use for a web with mobile apps realtime project?
We were planning to develop a realtime project in which features like call, chat, and video calls are there between customers and vendors and charged per minute from customers as per call/chat rate of vendors. Which technology from the latest one we will use that is best for a web application? Also, app will also be there for this same project so, what will be best for android and iPhone? so that in future we not have to feel that the chosen language/technology is outdated or can't handle our project.