Just in case you weren't already having some anxiety about your biological clock (whether you're hearing it ticking or not), someone made an app that will remind you--daily--how many fertile days, hours and seconds you have left.
Yup, someone invented it! It's called the Wonder Clock, and it's available for $1.99 on iTunes. Just plug in your age and, voila, let the countdown begin! (Just check in to see how many years, days, hours and seconds you have to, well, conceive).
Of course, the clock comes with a disclaimer that explains it's "based upon averages and is not a medical diagnosis" but “an interactive, conceptual piece that seeks to start a necessary and empowering conversation about childbearing."