i know there are a couple of Apps for the android is there anything for apple, i have had a few in the past but with upgrades i have lost them, looking for a gps volume control, so when the boat slows down the volume drops, boat speeds up the volume goes back up, user can preset gps speed that they want the music to change at and the amount of volume that goes up or down. I did search but could not find anything on here or on the app store,
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