Yes you can. It does not really matter if you have wifi hotspot available on your holiday location or not, the manual explains you how to set it up on any holiday location using either a local WiFi hotspot or using your mobile phone’s hotspot.
You can even use it without any hotspot, so fully offline. In that case you need to be 'close' to your KiddieAlarm to be able to operatie it (see it's status, change the status, change the settings,...). Everything is explained in the holiday manuel section.
We have extensively tested this and the KiddieAlarm comes out quite impressive. It does require only a weak WiFi signal to be able to connect. Even in a corner of a holiday bedroom with such poor WiFi connection that our mobiles all refused to connect to it the KiddieAlarm connected without any problem!