Background
Teaching CPR for years, I noticed a consistent gap: students understood the steps but struggled to maintain the correct compression rate of 100–120 per minute under pressure. Counting in your head while managing a stressful scenario is harder than it sounds. I built this app to give providers a simple, reliable tool to practice with—and eventually lean on during real events.
Features
The app delivers an audible and haptic metronome locked to the AHA-recommended compression rate. A visual cue pulses in sync so users can follow along without looking away from their patient. Sessions are timed, and basic stats (compression count, elapsed time) are displayed at the end.
Apple Watch integration lets the metronome run entirely from the wrist—haptic taps keep the rescuer on rhythm hands-free, without needing to glance at a phone.
Built With
The app is written in SwiftUI for the iOS interface and WatchKit for the Apple Watch companion app. Haptic feedback is handled through Core Haptics on iPhone and WKInterfaceDevice on Watch. No third-party dependencies.
Status
The app is functional and has been used in training sessions at Massasoit Community College. A public release is planned once a few remaining polish items are addressed. More details and screenshots to come.