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Hackprincetonchrono 4eb2c6d23b25332671820ee27b250ef2ec4b6fdd3d5b66c53377555d10e1a300

Chrono | Emergency

An Apple Watch app that gives those with mobility disabilities peace of mind in case of an emergency.

Winner of HackPrinceton Spring 2016 Best Use of AWS.
Github13 7cc3e10610ad42f7f693d1c16a4a06e5dc17f14745567ba5a679de8e7e259ee3 Devpost 256 90721c0a00b1bddf28e9bfb88a39f6532d09e9a52610e6b8e439675ed4142d09


  • Create Apple Watch application that polls accelerometer every 0.05 seconds to build a range of average motion. Once an outlier is present, we assume the device wearer has fallen and is prompted to confirm their safety. If no reply within 30 seconds, notify emergency contacts of a possible fall.
  • Apple Watch application along with its companion iOS application both written in Swift.
  • Used Twilio to send SMS messages and AWS Lambda to handle user credentials, contact list, and SMS service.

Possible Improvements

  • Poll heart rate monitor in Apple Watch when fall is detected. If heart is not beating, contact emergency services (911).