Wake on Lan app for a newbie

Looking for a foolproof wake on Lan app that I can use on the mobile via WiFi that won’t involve me having to play with router settings. I’d like to initiate the wake on Lan via my mobile phone.

Appreciate any advice.

Server is windows 11 running roon server

For me Mocha WOL works fine. On iPhone. Nothing fancy, but does what it is asked to do.

The following work great on iPhone/iPad: