The IOS app works really well for me, BUT only if I use the IP address of my HA server. However, if I put my mnemonic (DDNS) address in, I get “Could not connect to the server” error.
DDNS is configured fine, as is port forward: If I put my mnemonic (including the port number) into the web browser, it works fine.
Doesn’t matter if I use my home WiFi or use my phone in 4G mode with the WiFi off. Same result. That’s the bizarre bit. I can’t even claim the router’s just doing its job and routing!!