I submitted a idea for a iPod app to a company owner,he seemed interested and stopped communication. 1.5 years later it was released am I entitled?

As a general matter, when you provide someone else with an unsolicited idea, the recipient is under no duty to treat your disclosure confidentially or to refrain from making commercial use of it. An inventor or other creative individual who wishes to protect such an idea must first obtain an agreement from the company to which the idea is going to be disclosed in order to protect it. While it is possible that the company might settle your claim if properly asserted, it will be extremely difficult to find an attorney who is willing to take such a matter on a contingent-fee basis.