First of all, much gratitude to djgutheinz for writing the Kasa app integration in the first place!
This week my closet motion rule stopped working. After all the troubleshooting it pointed towards the Kasa app. I dug around and learned about the built-in version, installed it, rediscovered my devices and all is good now.
But when I tried to remove the user version of the app it warned me that I would lose all my device definitions. Yikes, no.
Sorry if this was already addressed somewhere else. I tried to find something in vain -- but which app am I using if both are installed, and when can I remove the user version?