1) Right Click the StretchClock icon in your Chrome Toolbar
2) Choose "Remove from Chrome"
This will completely remove StretchClock and stop all exercises.
Note: If you do not see the StretchClock icon in your toolbar, look for the puzzle piece icon in your Chrome toolbar. From that menu click the Pin icon to place StretchClock in your toolbar.
Is there something we can do that would make StretchClock more useful? We are always looking for ways to improve.