pull down to refresh
mutinywallet.com
that domain is not "self-custodial"... you said yourself... run your own node / domain. not your domain = not your node... or we get back to WoS domains?
btw... did you ever tried to install a latest web browser on an android 5? LOL where is that security expert Tony Giorgio, recommending to run an old browser that will keep the node keys ?
You can try app.mutinywallet.com in the web browser on that phone.