Not only is this wonderfully functional, but wildly entertaining. I can feed the cat while I'm at work or away for the weekend. I can feed him on a schedule, with the option to push extra portions to him if needed. I can increase or decrease his portion size. BEST OF ALL, he is learning to associate the tone the cat feeder makes with eating, rather than begging for food. He could be completely asleep, but once that tone sounds, he teleports to the feeder. It never fails to make the whole family laugh! I combine a few puzzle toys with a couple of scheduled feeds, and he stays active, fit, and healthy. This is much more economical than most robofeeders, and I save a lot of food, because this measures for me. The app works great, and there is no lag between the app and the feeder. Love this thing!