I run wefwef in my own unraid server and I'm using NginxProxyManager. It works great but I really see no benefit, it's just for fun.
On the other hand, as a downside, whenever you update your docker container because wefwef got a new release, it takes hours for your phone installed app to realise there's an update and update itself.
If I use wefwef.mysite.com I'll see the lastest version. if i use the installed app I'm still on 0.12.1 eve tho I updated the container hours ago.