app not available in my country?

I'm having issues with my s5, I just picked it up yesterday coming from an iPhone 4, big difference in performance. Anyways, a few apps I had, bigger apps like clash of clans, credit karma. And fratmusic, I go to the page they're on and it says the app is not available in my country, I'm located in the U.S.

Hi,
Can you kindly check the region you have set up in your Google Account? Most probably it's due to the fact you have set up an area that's outside the US as your country in the Google Account you're using. After you have checked that, Go to the App manager and tap the Play Store and clear its cache and wipe its data. Hopefully it will help. If it doesn't remove the Google account and add it again.
Also kindly ensure you're not using any VPN software as it may cause your IP to belong to a different country as well as all the apps you mentioned are available in USA.