I've always used Show Stopwatch on iOS however a lot of my colleagues have android phones - or are too stubborn to pay the small fee - and therefore they can't use it.
Not knowing of a better alternative, I've written a small web-based program that is completely free for the foreseeable future and is live at newbielink:https://apps.xsc.co.uk/showtime/ [nonactive]
I'd really love to hear any feedback from people who have used this; good or bad since I want to keep improving it as time goes by.
Thanks for your time,
James