We have been working on a timer application with my sister. The app is located at http://timer.ac. The description of timers can be given in the url. For example,

    http://timer.ac/5 minutes

starts a 5 minutes timer. It is possible to describe a sequence of timers, e.g.,

    http://timer.ac/25 minutes, 5 minutes

It is also possible to give names to timers. For example,

    http://timer.ac/25 minutes Work, 5 minutes Rest

You can use “m” or “min” instead of “minutes”. Of course, you can also use seconds and hours. It is also possible to run parallel timers, and there are many other possibilities, some of which are described at http://timer.ac/examples.