Mobile data plans can be expensive when going abroad, but Alarmhandler works even if you turn off the data on the phone. The app will operate in offline mode - but you will not receive push messages and thus not asked if you can help if an event occours. Instead, the Alarmhandler will use your response team and coordinate efforts. You can turn on the data and press the sync button the top right of the status screen to keep you abreast of the state of your home from time to time if you want.
Your property must be located in one of the countries that can be selected when creating an account in the app.