I need a developer

[X Webb]

I have a great idea for an easy-to-design app that will be a big hit
in Texas. It would only have to pull data that I would update weekly
and run some simple math calculations (maybe allow me to update a few
small images too). I'm not sure what the rate for a developer is, but
would anyone be willing to design this simple app for:
$400 upon completion
plus 50% of profit for first 6 months on the market
plus 25% of profit for the next 6 months on the market

We'll both clean up, especially once the marketing campaign gets
going. And doubly so if you can also port the app to Android.

Counteroffers welcome. Thank you.