Awesome Golf App

Started the Trial today for Awesome golf. I really wat to like this App for my R10, But couple things what should I set the Altitude for? If I set it to my exact altitude it doesn't seem accurate at all. Also was hitting 8i carry was pretty spot on around 133-135 but then I would have 30yds of rollout showing my total 8i Around 165-170. Are there something I'm missing in setting up the Awesome golf??