Sound when approaching waypoint or when using 'guideme'

I suggest adding the ability to add customizable sound to a waypoint.  That way when I reach a turnoff from one trail to another the waypoint would sound and I'd know without having to visually check my map. Visually checking the map can be cumbersome especially in winter, involving stopping, removing the phone from an inside pocket where it stays warm enough to operate, waking the phone, navigating to the map, and perhaps removing sunglasses, goggles or gloves and then putting the phone back, etc., etc.

Ideally, there could be a warning message heard eg "approaching waypoint in 200 feet"  and then "at waypoint" when I arrive and "you have passed your waypoint" if I continue past the turnoff. Or the message could be warning about danger such as "approaching cliff" or "sharp turn ahead".  Maybe the warning could be a clip of The Beegees singing 'Staying Alive' ;)

Ideally this feature would work on both apple and Android phones.