Stekker.app develops smart charging apps and algorithms so that electric vehicles and other energy buffers are a solution to the transition to a sustainable grid. Without these, costly additional expenses are required both to add renewable power generation to the grid and to supply power to electric vehicles from the grid. Costs can be prevented by leveraging a driver's flexibility and drivers get rewarded for making this possible. Stekker.app is the Mobility Service Provider that develops smart energy infrastructure for a sustainable world and makes charging an electric vehicle cheap, clean and easy.