The present disclosure relates to a dose indicator comprising, a chassis comprising a 42 chassis frame and a displacement portion, an indexable first display unit, mountable on the chassis, the first display unit being indexable about a first display axis, the indexable first display unit comprising a plurality of indexing teeth, a first display non-return arm, and a drive pawl connected at its proximal part to the displacement portion, the drive pawl comprising a socket at its distal part, the socket being adapted to engage an indexing tooth of the first display unit during indexing. The disclosure further relates to an actuator for an inhaler, wherein the actuator comprises a dose indicator as described above. The present disclosure is also directed to an inhaler comprising such actuator.

A magnetic rotational set counter. The magnetic rotational set counter includes a front plate connected to a back plate. In between the front plate and the back plate, there is a number disk having a magnet inserted in a central cavity of the number disk. A ticker is included which has an elongated arm and an end piece. A display window is integrated into a front of the front plate. The number disk has an array of chronologically ordered numbers. A single number is shown from the display window of the front plate when the user turns the bottom portion of the number disk, which protrudes from an access window between the front plate and the back plate. The number disk is configured to rotate in a single direction in a forward direction. The ticker and number disk are configured to prevent miscounting.