Dose counter subassemblies for use in dry powder inhalers

A dry powder inhaler device comprising:

• an actuator for operating a dispensing mechanism of the dry powder inhaler device;
• a first count wheel configured to be rotated by the dispensing mechanism, wherein the first count wheel includes a single tooth extending radially outward from an outer circumferential surface or side thereof;
• and
• a second count component disposed adjacent to the outer circumferential surface or side of the first count wheel, wherein the second count component includes a plurality of notches on an outer surface or side thereof, each notch extending radially inward and each notch configured to mate with the single tooth,
• wherein the single tooth of the first count wheel engages one of the plurality of notches of the second count component once per revolution of the first count wheel to intermittently rotate the second count component, the first count wheel and the second count component being configured to rotate in opposing directions, and
• wherein the first count wheel and the second count component collectively display a number of doses remaining within the inhaler device or a number of doses delivered by the inhaler device.