A quiet companion
for the
racing heart.
SVT Monitor watches your heart rhythm on Apple Watch, flags possible supraventricular tachycardia episodes, and helps you connect what you felt with what your body was doing — all on your own device.
Built around the moments
that matter.
Every feature is designed for the reality of an SVT episode — logging fast, capturing context, and giving your cardiologist something useful to read later.
Live HR & ECG
A live ECG waveform synthesized from your Apple Watch heart rate, with a status chip that shifts from calm green to coral as your BPM climbs.
One-tap episode log
Start, end, severity, and a note — on the iPhone or directly on the Watch face. Faster than the episode is over.
Live Activity
An active episode pins to your Lock Screen and Dynamic Island with current BPM, duration, and a vagal-maneuver shortcut.
Shake to log
A wrist shake instantly starts an episode and offers a 5-second voice note describing the trigger — no fumbling required.
Travel mode
When you're more than 50 miles from home, SVT Monitor surfaces the nearest cardiology-capable hospital with a one-tap call.
ER AirDrop share
One tap packages the last 60 seconds of HR and any ECG into a triage handoff for the ER team — no email, no upload.
Smart insights
Spot the patterns — caffeine, alcohol, sleep, and time-of-day — that correlate with your episode burden over the last 30 days.
Cardiologist export
A clean FHIR Bundle export turns your episode history into a one-page summary you can hand to your care team.
Apple Watch native
Complications, Smart Stack, and severity-log tap targets put logging right on the watch face without opening the iPhone.
Nothing leaves your device.
SVT Monitor has no account, no login, no server. HealthKit data is read on device. Episodes sync only through your own iCloud. There are no analytics SDKs, no tracking, and no third-party data sharing — the privacy label on the App Store reads Data Not Collected.
“For Mom, love you forever.”
— The reason this app exists