Like ryanelkins, I only answered the first 2 questions in the survey because the rest didn't really pertain to me. I've checked out many of those apps but never

Like ryanelkins, I only answered the first 2 questions in the survey because the rest didn't really pertain to me. I've checked out many of those apps but never became a real user. That being said, there are a couple of things that I think could be killer features. On the working out side, I want an app that intelligently tracks what I'm doing. For example, I could strap it on my arm while I bench press, and the accelerometer detects my reps etc. Not a trivial thing to do, but for me this would be incredible. As far as nutrition goes, I've often dreamed about a service that taps into credit card purchases (via Yodlee API) to give a rough estimate of nutritional intake. For example, a purchase total of $6.47 at Taco Bell could be items X, Y, or Z which has an average of 650 calories. Once again, not a trivial problem to solve but very very valuable. Good luck, once you get an MVP I would love to test it out.