I'm going to give you some feedback on design rather than app / messaging / etc.

1. Line Height! Woo! Line height is the space in between the lines of text. In css, you use

    
        line-height: num;

Here's your site now:

Here's it with 150% line height (I used * { line-height: 150%; })

2. I know you love your huge uppercase first letter but frankly it doesn't work for an app like this. You end up with wicked white space (and not in a good way.) My advice is to drop it, use that white space in other places (like a decent padding on your interior boxes).

3. Typography. Typography is hard. It really is. I truly suck at it. So I steal from other places. Here's some of my favorite sites that show me how to do type good: http://www.typ.io/ http://hellohappy.org/beautiful-web-type/ http://fontsinuse.com/

If you have any inclination to improve your design / type skills (which you totally don't have to if you want to focus on dev), I recommend Chrome Extensions Font Ninja and WhatFont. These allow you to click any element on a page and see font, size, color, line height, etc. Then be aware of every site you are on and how they use type.

Now, a bit about the app premise. I understand the idea and I think it's novel (at best). What I think you need to find a way to show why you want to submit content to be featured AND why a user would want to visit the app to see the content. My first thought is...man what happens if the winning post is like "poop". Then I don't get anything new for 24 hours? Some things to think about might be spontaneity, serendipity, ease of use, non-addicting (hey..you don't have to scroll forever like you do on facebook), etc.

Also, your stats for social media may be correct but I'll argue that only your users of your apps will hear what I have to say. It's not "everyone" - especially since at least 50% of my friends are on iOS.