Scheme URLs and fallback if the app is not installed

I'm trying to link to IMDB from inside my app - ideally to the IMDB app but if this is not installed I want to launch the web page.

If I use Device.OpenURI and pass a valid scheme URL for IMDB, then it launches the IMDB app if it's installed. If it's not installed then nothing happens.

Is there any way to detect if the app is installed or if the OpenURI call works?