help making a chess app

Learn to program in C# or Visual basic and you can use the free Microsoft Visual Studio to build your application.
Another option is to learn Javascript and PHP. Then you can build it online.
A third option would be to hire me to do it for you.

I'm also a programmer you could hire. If you're interested in hiring a programmer I'd recommend going through oDesk to keep everything open, documented, and above-board.

Sqod is correct. If you are going to hire someone to write a piece of software for you, it is best to go through one of the many freelancing sites out there. They offer great protection for you.

If you are smart and determined enough, you may be able to learn all you need to know from the internet.
This is how I started out 7 years ago.
I started out making games for my students using Flash. The I learned VB, C# to make desktop applications.
Then, a few years ago, when people started leaving Flash, I leanred PHP, Javascript and basic HTML/CSS
Most any question you could ever have about a programming problem has been asked on the internet. So there are lots of great sources for learning.

I want to make a chess app but dont know where to start