Major Flaw: Must Remain Open

The app is beautiful and simple to use. However, every time I have locked my phone while using it, the timer is canceled. Half the time when I switch between apps the timer is canceled. Makes its useless for running and troublesome for using alongside my ebook workout guide or pandora. Without multitasking it works wonderful but is very easy to miss the one beep that signals the interval.
Keeping the app in hopes it only needs a simple fix.

Amy Russell about Pacer Fitness - Interval Timer