Accessing the Time Clock is done at the passcode screen. Enter your passcode and tap the Time Clock button in the bottom right corner.
On the next screen, you'll be able to select the job for which you are clocking in. Tap Clock In to begin your shift and then tap Go on the next screen.
When it is time to start a break, simply repeat the first step (Pin in and tap Time Clock). From the next screen, tap Start Break.
At the end of the break, access the time clock again and tap End Break (in parenthesis will be the number of minutes the break has logged so far).