question

Hi, my app has been live for sometime now, but whenever I try and find the app in the appstore using my kndle fire I cannot find it even searching "Shop Local Club Card", please could you advise what I am doing wrong. Also I have purchased a couple of Kindle Fires and I want to install my app on them and then pass these on to my customers. Please could you tell me the best way of doing this without exposing my details to the customers. I look forward to your most prompt response. Kind regards Marcus