A counter system for use in a drug delivery device is provided. The counter system comprises a counter element which is a foil, the counter element comprising indentations and indicia associated with the indentations, and a drive member provided with a catch for driving the counter element, wherein the catch engages a first indentation, and wherein, the catch is configured such that, when the drive member moves in a first direction, the counter element does not move and the catch disengages the first indentation and engages a second indentation which is arranged adjacent to the first indentation, and when the drive member moves in a second direction which is opposite to the first direction, the counter element also moves in the second direction.
