Sorry in advance if this sounds irrelevant to OpenWrt.
Currently I have an iPhone and use the iOS Shortcuts app which I've setup with various SSH scripts to do things like reboot the router, enable the VPN change server and the likes. It works ridiculously well, from the lock screen I can easily manage most things that I'd regularly do without having to login to the router or do anything through the luci.
I'm moving to Android however - does anyone else have a similar set up? I'm not finding anything by searching online that seems remotely similar to what I have on iOS.