App will be available for download on customer website in iOS

Is this Possible in iOS:

1.App will be available for download on customer website. Option to download will be given

2.Anyone can download app but the app will not be available on App Store

3.It should be ad-hoc or enterprise program or something that will make that happen

Thanks in Advance .

Solution

I have found some useful document to solve this problem :

FOA: The Answer is YES . We can grab above functionality .

With the Help of Enterprise based App (In-House) we can do this .

Some of the Useful Doc reference here :