Pricing does depend on the app itself. In general, since a lot of people are interested in mhealth, I would encourage you to think of a freemium option that would work well.

For pricing our apps, freemium has always been more lucrative than a paid app. I have a theory that most people want to try software before paying for it.

For blogs, I would encourage you to embargo publishing information till you are live in the app store (bug free). Keep in mind, that there may be delays in testing and app store review.

Happy to talk more if you need specific advice.

Cheers,
Aditya