simple answer is,
1 buy prowl for phone. or obtain through alternative means, a prowl-compatible application.
2 set up the prowl account, so your phone is sync'd up with their service.
3 go to the prowl website on phone or on PC.
Prowl - iOS Push Notifications
4 setup a new API key from
https://www.prowlapp.com/api_settings.php
look for the section called "Generate a new API key"
in the note: Add BuddyCenter (WoW) so you can see what it is later on.
you should get a new API code, like ... a884f17419f712f2253eb0f7b124e4718de710d5
(don't use this, i've edited this one)
5. paste in the API key in the plugin config.
6. start the bot.
7. every 10-30 minutes, you should get a prowl notification that shows your character's location.
If you have Notifo or the windows phone 8 app, the install procedure should be very similar to this. one day they may add NotifyMyAndroid, the API calls are nearly 99% similar, so a software patch could add it in.
as Notifo retired last year and won't be updating anymore, NMA may be the preferable option. and there's some newer multi-console apps like boxcar, etc.