Like any other Android app, you can install (purchase) iReal Pro from the Google Play Store app on Chromebook (except some older models).
Download, install, use apps, updates, resize etc. Google information
How to get Android apps on a Chromebook Alternate information
How to get Android apps on a Chromebook Alternate information
Using your keyboard in iReal Pro, key commands etc.
Tip: to share songs, playlists, audio, recordings, backup save to Drive (you should see it listing in the Share sheet window, unless it is disabled in your Chromebook Settings.) For audio you wish to email, use AAC.
Or use a File manager app, one which will show in the Share sheet window (not all do.)
Or use a File manager app, one which will show in the Share sheet window (not all do.)
For example some of our users have recommended FX File manager, Solid Explorer and CS Explorer which show in the Share sheet window, allowing you to save to the SD memory of your Chromebook, Downloads or Documents folder (however this uses up your Chromebook memory) or elsewhere.
(As at Sept 2025, Files by Google does not show for some reason (Google's File manager) in the Share window.)