Veterinarians looking to measure the heart rate of their furry patients now only need to look as far as their iPhone 4 or 4S. AliveCor's Veterinary Heart Rate Monitor combines an iPhone case and a free app so that users can take an ECG (electrocardiogram) using only their phone. The $199 case, which is currently only available in the US, features two electrode strips that make contact with the animal's skin to take the necessary readings. That information can then be read via a free mobile app, as well as be stored online for later access. The company says that the monitor is ideal dogs, cats, and horses, and it's also working on developing a version for humans — though its website points out that the device has yet to be cleared by the FDA for use in the US.