Litter-Robot + IFTTT
https://www.litter-robot.com/ifttt.html
IFTTT, which is an acronym for “If This, Then That,” is a free and easy platform that allows all of your apps and smart home devices to talk to each other. Connected products such as the Litter-Robot integrate their API with IFTTT so that users like yourself can simply point, click, and connect all of your smart home products without writing a single line of code—it’s that easy! For example, both Litter-Robot and iRobot connected so that whenever your unit cycles, your Roomba shoots on over to vacuum the area.