Gimdow is an easy to retrofit, smart door lock that is simple to mount on the inside of a door with a durable, but removable adhesive. Due to its modular construction, it works with most American deadbolt and European cylinder door locks. Gimdow is remarkable for its good resistance to wear. The lock can open doors with the help of a wireless keypad, a smartphone or an actual key. Users can furthermore decide who may have access to the lock during their absence.