You may have came across a situation where you need to share your local app to clients (in other words your Rails app running on your local server port 3000).
You may have came across a situation where you need to share your local server.
So in such cases a widely used tool is [localtunnel]
But it has a limitation with consistent url as it generates a random URL for every new instance.
[Pagekite] suffices this need and gives a consistent URL for one server bind to a port.
PageKite makes local websites or SSH servers publicly accessible
install - $ curl -s https://pagekite.net/pk/ | sudo bash
start pagekite -$ pagekite.py 80 yourname.pagekite.me