The standard ColorReader app comes with popular fan decks from various manufacturers. You have the ability to choose which fan decks are used to find the best match for your measurement.
To choose the fan decks you want to use within the ColorReader app, launch the app, connect your ColorReader EZ / ColorReader or ColorReader PRO and take a measurement. On the Color Reading screen, there is an option in the upper right corner of the screen labeled "Change" with a picture of a fan deck. Click on this icon and you can turn on or off the fan decks you would like to use in order to find the best color match.