Serveo is an alternative to ngrok.
PRO: does not need to download a software or to register to a service
CONS: no fancy dashboard
usage
ssh -R 80:127.0.0.1:32775 serveo.net
it generates a subdomain like https://volens.serveo.net/ that redirect the traffic on your local machine on local port 32775: http://127.0.0.1:32775/
I'm using it on DDEV and works also with the XCode Simulator.
check it out at https://serveo.net/#manual