The latest version of the i-Boating application now lets you set an alarm for depth and wind speed. Its supported on all platforms (iOS, Android, Windows and MacOS).
You must have a working NMEA instrumentation set up in the i-Boating application to use these features. Simply tap/click on the blue text/button showing the depth to set the alarms, adjust thresholds etc.
I've included below a few screenshots with this feature in action.