David Cooper created an iPhone app in 2009 based on javascript for the omer widget I wrote in 2008 (see the widget at right), and implemented an idea I had: the Tree of the Sefirot appears, with a ring around the Sefirah of the week and a dot inside the Sefirah of the day. David Cooper also added the count formula and blessing in Hebrew, English and transliteration, and he updates the app with new features every year, like changing the day based on sunset in your actual location, keeping track of which days you've counted, and sending you reminders to count. This year the iPhone version of the app also displays botanical illustrations for each day by Pauline Frankenberg. I also choose quotes for each day, which I change a little bit every year.