(Associated Press/Jim Mone)

The brainchild of a Macalester College graduate to help his father overcome combat-related nightmares has turned into a promising — but still experimental — medical app that is being tested by the Minneapolis VA Medical Center.

Called NightWare, the app is loaded onto an Apple watch, where it learns to track the pulse rates and biometric readings of wearers when they have nightmares. Once trained, the app instructs the watch to buzz lightly, rousing sleepers from their nightmares without fully waking them.

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