Hi Terence,
I'd like to offer a refinement.
Rather than directing users to open a browser that opens up a mobile site, ask them how they'd like to share, and then launch the app that they usually use:
String marketUri = "http://example.com/?q=app&title=test";
Intent intent = new Intent(Intent.ACTION_SEND);
intent.setType("text/plain");
intent.putExtra(Intent.EXTRA_SUBJECT, "I found an awesome app");
intent.putExtra(Intent.EXTRA_TEXT, "Check this app out: " + marketUri);
Intent chooser = Intent.createChooser(intent, "Which app you want to share with");
startActivity(chooser);
This chooser will offer a list of apps that are able to share text and are installed, including email.