Help Needed! – Periodic Timer Review

Where can I change settings when using this app on my iPhone? I only see one page - where I can set/start/stop the timer. I need it to vibrate, not make sound. Also, this is the third time I'm writing this. I hit send, I'm told the nickname is taken and everything I wrote is deleted??? How about just taking me back to change the nickname and not making me start all over ??
Review by Please respond to this! on Periodic Timer.