Customizing haptic effects on an end user device

Systems, methods, and associated software are described herein for enabling a regular user of an end user device, such as a cellular telephone, to customize parameters associated with haptic effects applied to the user by the end user device. In one implementation, among several, a method described herein includes enabling a user of an end user device to access software adapted to design or modify haptic effects of the end user device. The method further includes enabling the user to open a haptic track file and enter or modify parameters associated with the haptic effects of the opened haptic track file.