https://www.cnet.com/news/kangaroo-rounds-out-its-simple-security-system-at-ces-2019/

All of these will launch this spring. Kangaroo showed off a doorbell cam and an indoor cam too, but didn't offer any details, as they won't launch until later in the summer.

The original sensors cost $1 a month for basic app functionality, but Kangaroo will no longer charge for push notifications. You can also customize the hours during which sensors will send notifications and they're supposedly smart enough to ignore pets.