I’m new guy at here. How to get the BuildStore apps?

First of all, to install the apps you must register using this link. After the registration process being complete, hit “regiser this device” button on the gadget you want to associate with your account. Then, you should accept installation of the mobile provision. After that it's time to make a payment for your device and proceed to the main page or go to "Apps" from your account page. Tap "Install" button near the interesting application and you get it on your registered device. Voila!