For all you fitness-freaks who want to monitor your heartbeat rate during your work out, there is an app for that. The 60beat Heart Rate RX monitor is an accessory for the iPhone that allows you to monitor your heart rate while you’re working out. All you have to do is connect it to your iPhone’s 3.5mm headphone jack, strap it to your chest, launch the app and you’re good to go. Besides 60beat’s own app, the device is compatible with a number of apps already available on the iTunes App Store such as LogYourRun. The device can be purchased for $29.99 from its online store and is available now.