         description2Label.sizeToFit()
         goToSiteButton.setTitle(NSLocalizedString("goToSite", comment: ""), forState: .Normal)
         
-
         // hide navigationController's builtin toolbar
-        self.navigationController?.setToolbarHidden(true, animated: true)
+        self.navigationController?.setToolbarHidden(true, animated: false)
         
+        // adjust top & bottom space constraints
+        var vertSpace: CGFloat
+        if (mainView.bounds.height <= 480) {
+            vertSpace = mainView.bounds.height / 20
+        } else {
+            if (mainView.bounds.height <= 568) {
+                vertSpace = mainView.bounds.height / 10
+            } else {
+                vertSpace = mainView.bounds.height / 5
+            }
+        }
+        topSpace.constant = vertSpace
+        bottomSpace.constant = vertSpace
     }
 
     override func didReceiveMemoryWarning() {

    @IBOutlet weak var description2Label: UILabel!
    @IBOutlet weak var goToSiteButton: UIButton!

    override func viewDidLoad() {
        super.viewDidLoad()
        

    
    let siteUrl = "https://desolate-island-2917.herokuapp.com/about"
    let itunesUrl = "itms-apps://itunes.apple.com/WebObjects/MZStore.woa/wa/viewContentsUserReviews?id=APP_ID&onlyLatestVersion=true&pageNumber=0&sortOrdering=1&type=Purple+Software"
    let appId = "123456789";
    
    @IBOutlet weak var logoImageView: UIImageView!
    @IBOutlet weak var appNameLongLabel: UILabel!
