Hi blackuprise,
Thanks for reaching out. The Google Home app is only available in the countries where the Google Nest devices are supported. Since Serbia isn't one of the supported countries, this could be the reason why you're getting a message that it's unavailable for download.
We're always looking for ways to bring more products and services to other regions and countries — we'll take this as feedback. Let us know if you still have other questions and concerns otherwise, I'll be locking this thread after 24 hours.
Regards,
Jennifer
