From a Home screen, navigate: Apps > Settings > Applications (Device section).
Tap Application manager (located in the upper-right).
From the All tab, locate then select the appropriate app.
If necessary, swipe left or right to switch tabs.
Tap FORCE STOP.
Tap OK to confirm.
From the Storage section, tap CLEAR DATA.
This option may not be available for some apps.
Resetting an app or clearing data storage may delete saved info within the app (e.g., calendar events may be lost).