My “istethoscope” application (which allows you to listen to your heartbeat and features a little undercover scientist giving little facts now and again) has now been on iTunes for just under three days. To my surprise it’s had over 7000 downloads already and is in the top 30 Utilities in the store. I’m hoping it will help people become aware of The Undercover Scientist book, so it’s very exciting that the app is popular so far.

If any reader of the book or user of the program has any ideas for other free "undercover scientist" programs for the iphone, or something for the "Why Sh*t Happens" US version, let me know!

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