Simply perfect

Its all you need for a timer. Ive used it on average 194 minutes per week, which I know because the Chart option which shows some stats on your workout which is a cool add-on.
I use this app through a portable Bluetooth speaker which makes it loud enough to hear at the gym, which is about the same cost as the last round timer I bought off a boxing website.

DanitronD about Boxing iTimer Lite, v1.9.1