Medical emergency? If you are experiencing chest pain, fainting, shortness of breath, or a prolonged episode, call 911 (US) or your local emergency number. SVT Monitor is not a medical device and cannot summon help.
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Frequently Asked Questions
Does SVT Monitor diagnose
supraventricular tachycardia?
No. SVT Monitor is an informational tracking tool. It looks at
heart-rate patterns to highlight episodes that might be SVT
so you can log them and discuss with your cardiologist. It does not
diagnose any condition and must not be used to make medical
decisions.
What Apple Health data does the app
need?
Four read-only permissions: heart rate, heart rate variability
(SDNN), resting heart rate, and sleep analysis. The app never writes
to Apple Health. You can revoke any of these at any time in
Settings → Privacy & Security → Health → SVT
Monitor.
Do I need an Apple Watch?
No, but it is strongly recommended. Without a Watch, heart-rate
samples come only from the iPhone’s periodic syncs from any
paired heart sensor (Watch, chest strap). With a Watch, detection
runs near-continuously on wrist data.
The dashboard shows no heart rate
after install — what happened?
Usually one of three things:
-
HealthKit permission was not granted. Open
Settings → Privacy & Security → Health → SVT Monitorand enable all four categories. - No heart-rate samples exist yet for today. Open the Apple Health app and scroll to Heart → Heart Rate to confirm data is flowing.
- Your Apple Watch is not paired or not currently worn. Put the Watch on for a few minutes and pull to refresh the dashboard.
Why did it flag an episode when I
felt fine?
The detector uses a simple threshold rule: sustained heart rate
above a configurable BPM (default 150) for at least a configurable
duration. Exercise, caffeine, strong emotion, and fever can all
produce the same signature without an actual SVT event. The app
deliberately errs on the side of false-positives so you do not miss
a real one — use the “dismiss” action on any
episode that is clearly exertional, and tune the threshold in
Profile → Alert thresholds.
How does iCloud sync work?
When you tap “Export history to iCloud” on any device,
the app writes a JSON bundle of your episodes and triggers to your
personal iCloud Drive container at
iCloud Drive → SVT Monitor. On another device,
open the app and it merges the bundle automatically on next launch.
Duplicates are filtered by episode UUID, so multiple devices can
safely sync into the same store. AIBridges has no access to this
bundle — it lives inside your Apple iCloud account.
Can the Mac app import from iOS?
Yes. The separate SVT Monitor Mac app (available directly from
aibridges.org) has a
Settings → Data Management → Import from iOS App
action that reads the same iCloud bundle. Both apps deduplicate by
UUID so re-imports are safe.
What does the “Ask AI”
tab do?
On iOS 26 and later, on supported devices, it uses Apple’s
on-device Foundation Models framework to summarize your recent
episode and trigger data in plain language. Everything runs on the
iPhone’s Neural Engine — no prompts, data, or summaries
leave your device. If Apple Intelligence is unavailable on your
device or disabled in Settings, the tab is hidden and the rule-based
Insights tab is used instead.
Can I export my data outside of
iCloud?
Yes — the same iCloud bundle is a plain, human-readable JSON
file in your iCloud Drive. You can open it with any text editor,
move it to Dropbox/Google Drive, or hand it to your cardiologist. On
iOS 26+, Profile → Draft cardiologist report generates
a one-page summary you can PDF-print and bring to your appointment.
How do I delete all of my data?
Three options, in order of thoroughness:
- Delete the app — removes all on-device episodes and triggers immediately.
- Delete the iCloud bundle — Files app → iCloud Drive → SVT Monitor → long-press → Delete.
- Revoke Health access — Settings → Privacy & Security → Health → SVT Monitor → Turn Off All.
Notifications aren’t firing
— what do I check?
Open
Settings → Notifications → SVT Monitor and
confirm Allow Notifications is on. For episode alerts
specifically, enable Time Sensitive Notifications so they
pierce Focus modes. Also confirm your alert threshold in the
app’s Profile → Alert thresholds is not set higher than
any heart rate you actually reach.
Can I use this outside the United
States?
Yes. The app has no geographic restrictions. Heart-rate thresholds
are configurable and the app does not rely on any regional service.
It is English-language only for v1.0; additional languages are
planned.
Troubleshooting
iCloud sync button says
“failed”
This almost always means iCloud Drive is disabled or the SVT Monitor
container is off. Open
Settings → Apple ID → iCloud → iCloud Drive
and make sure the toggle is on, then scroll down to confirm SVT
Monitor is permitted to use iCloud Drive.
The Apple Watch app is blank
Make sure the Watch has HealthKit permission: on your iPhone, open
the Watch app → SVT Monitor → Privacy and enable
Heart Rate. Also give the Watch a couple of minutes after a fresh
install to receive the first heart-rate sample.
“Ask AI” tab is missing
This tab is only shown on iOS 26 or later on Apple
Intelligence-eligible hardware (iPhone 15 Pro / Pro Max or later).
On older iOS or ineligible devices, the rule-based Insights tab
delivers the same kinds of patterns in a more structured format.
Auto-end of an episode was too early /
too late
Auto-end fires when heart rate stabilises below your threshold for a
continuous 60 seconds. Tap any episode in the Episodes tab and
manually adjust the end time. A future release will expose the
stabilisation window as a setting.
Privacy & Data
SVT Monitor stores everything on your device and in your personal iCloud. AIBridges operates no server and never receives your health data. Full details are on the Privacy Policy page.
Still Stuck?
If anything in this page did not solve your issue, or if you’ve spotted a bug, a typo, or a feature request, send a note via the contact form or call (401) 327-2971. Include your iOS version and iPhone / Apple Watch model so we can reproduce.