Great idea, why don't you invent one? I will buy it. Part of the joy of plants is taking care of them. This plant was stressed, but not dead. I observe my plants often, but sometimes something just happens. This plant is in the window right by my sofa so that I spot it quickly when stressed. It is one of my favorites. I never have counted my plants because I am afraid to know.
It takes a full day to water all of them (not including clean up which I do later because of fatigue.)
My animals (including fish) are spoiled as are my plants. I tend to procrastinate at times.
So have you thought about which other plants you want to adopt?
Take care, Joe - happy gardening!
Leda