With TimerBar you can create quick access to a stopwatch and a countdown that you will activate by means of an activator gesture, essential if you use any of these functions every day.
The native applications will not open as other tweaks do, the countdown or the stopwatch will appear on your screen with certain transparency, and once activated they will be seen in a small bar that will be located on the status bar from where you can stop the account or remove the bar.
It also comes with a couple of themes.
You can download it by $ 0,99 on Cydia.
You will find it in the BigBoss repo.
You need to have done the jailbreak.