I'm an app entrepreneur with $1M+ in revenue. Day to day, I design, build and run apps which were (until now) used tens of millions of times. Check out my personal site: http://davidkatz.me
I held key roles (CEO, CTO, Lead Product, Lead Design) for roughly two dozen products. Some worked, some failed miserably.
I teach product and startup strategy at Google Campus. I've advised over a hundred startups to date, so I've seen a lot of patterns and a lot of repeated challenges. If you're struggling with something, there's a good chance I've seen it before.
I often speak publicly about lean startups, MVPs, the importance of distribution (if you build it, they will not come), and 10x products (if your product isn't 10x better than existing solutions for some people, your chances are slim).
Please send me a paragraph about what you need ahead of time, it'll make for a more productive conversation.