Spy Dialer lets users look up cell phone numbers without any fees or membership requirements. Users can also upgrade to a paid membership to use the program's more advanced features.
Spy Dialer uses reverse phone look-up, so users simply need to enter a cell phone number to find out the owner's name and location. If other details are available, such as pictures or social networking information, they are also displayed.
As of March 2015, Spy Dialer provides three free spy dials each day. To gain more searches, users can choose to share their own address books or pay a yearly membership fee.