[dr_kiszonka]

Is there a simple app that notifies users about changes in internet traffic patterns of IoT devices on their networks?

[squarefoot]

You can't trust the devices themselves to tell you that, so the best approach is to put them behind a (hardware) firewall that protects both ways, not just from external connections but also to prevent devices to call home if their behavior is unclear.

[wil421]

Yes UniFi by Ubiquiti. There’s a price for admission.