Riffstation-desktop will not work on iOS or Android devices.
We do have an iOS version of our chord detector available in the app store though. It works with Youtube videos as opposed to audio files on your computer. You can check it out here.
We don't have any concrete plans for Android app right now but but it's something we would like to put together in the future. Contact us if you would like to be notified when an Android app becomes available!