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A boat motion monitor and alarm for iPhone. SteadyHelm shows roll, pitch, roll period, heading and vibration, records your trips, and can warn you if the boat starts to list or drags its anchor.
Listing Alert warns you if the boat starts to lean and stays leaning. This can mean water coming in, a shifted load or running aground. Normal rolling from waves does not set it off.
Anchor Watch warns you if the boat moves further than you allow from its anchor point. It also catches theft.
Everything stays on your phone. There is no account, no server and no tracking.