As a user playing a timed real-time game, when my remaining time decreases below some threshold (described below), I would like to hear a warning sound.

As a user of the app, I would like to be able to configure whether the app makes this warning sound or not from the settings.

The threshold can be fixed (e.g. 30sec, 10sec, 5sec) or depend on the game format played. Ideally this behavior should match the web app.