The Daily App Deals post is a round-up of the best app discounts of the day, as well as some notable mentions for ones that are on sale. Stress Check Pro by Azumio (iTunes) Previously 99¢, now Free. Stress Check Pro by Azumio for iOS tracks your stress levels using heart rate variability (HRV) as measured by placing your finger over the iPhone's camera. Get it for Free. (via LogicBuy) iOS iOS
