This is a very small timer app I created for myself to implement a habit described in this article:…This is a very small timer app I created for myself to implement a habit described in this article: https://medium.com/swlh/the-30-second-habit-with-a-lifelong-impact-2c3f948ead98#.minzqo6ay
Its default period is 30 seconds, but you can change it by clicking on the number in pop-up.