1. Simply Open the URL on your Android Phone Browser http://apps.appypie.
2. This will download the .apk file. After download completes, tap "install" and the app will install to your device. You'll be asked where to save it, and when the download is done you'll have the opportunity to 'open' it, this will launch the apps installer.
3. Tap "install" and the app will install to your device. (Once the app is installed you can delete the .apk file you downloaded if you would like, it's no longer needed.)