If you’re looking for an ngrok alternative for tunnelling that is affordable and just works (e.g., with Kitten¹), I can highly recommend LocalXpose (https://localxpose.io/).
(Not affiliated with them in any way; just use their tunnels for testing with Kitten on a daily basis.)
PS. If you have a static IPv4 address for your dev machine or if your network is IPv6 compatible, you can now run secure servers on IP addresses, so that’s another option if you need your app to be universally accessible during dev/testing (e.g., for web hooks, etc.) without requiring any external services. But, for most of us, something like LocalXpose is essential and it’s the best I’ve found so far.
