Pet doors, as a rule, suck. While the allure of letting pets in and out at their leisure is pretty appealing, the doors themselves tend to live at the intersection between troublesome to install, insecure, and expensive. Wayzn tries to take a different approach to most existing solutions, effectively acting as a robot that opens or closes an existing sliding glass door. The system attaches with the help of couple stick-on brackets, and folds up when out of use. (Read more)