Each of us sometimes wonders if he turned off the light, stove or kettle after leaving the house. Today you don't have to worry about it anymore. All you have to do is run SUPLA on your smartphone and you can immediately check whether everything that should have been turned off. If not, you can turn off the lighting/household appliances, close the blinds or close the entrance gate with one swipe of your finger. Download the application on your smartphone and start your adventure with SUPLA today. The software, like the rest of the project, is free and open source.