SuperFontan
Fitness for Fontan hearts.
A training and health companion for people living with Fontan circulation and single-ventricle congenital heart disease. See every metric against the benchmarks that actually fit your physiology — then train toward them.
Standard fitness apps grade you on the wrong curve.
A Fontan heart pumps blood to the lungs passively, so “normal” population targets for heart rate, VO₂ max or oxygen saturation don’t apply. SuperFontan plots every metric against two Fontan-specific benchmark bands instead, with a plain-language status under each chart.
- Normal FontanA typical value for adults with Fontan circulation — the line to beat.
- Super FontanThe aspirational target, inspired by the Super Fontan exercise-rehabilitation concept: what a well-trained Fontan heart can reach.
- YouYour own data, pulled from Apple Health or Health Connect, trended over time.
- Fontan ScoreAll of it rolled into one 0–100 number: how close you are to Super Fontan overall.
| Metric | Normal Fontan | Super Fontan | Better is |
|---|---|---|---|
| Resting heart rate | 60 bpm | 50 bpm | lower |
| Walking heart rate | 100 bpm | 90 bpm | lower |
| Heart rate variability (SDNN) | 50 ms | 80 ms | higher |
| Heart rate recovery (1 min) | 12 bpm | 25 bpm | higher |
| VO₂ max | 30 mL/kg·min | 40 mL/kg·min | higher |
| Blood oxygen (SpO₂) | 94% | 97% | higher |
| Respiratory rate | 16 br/min | 13 br/min | lower |
| Daily steps | 7,000 | 10,000 | higher |
| Weekly running distance | 5 km | 10 km | higher |
Default benchmarks as shipped in the app — general starting points, configurable, and meant to be reviewed with your congenital-cardiology team. Running speed, power, stride length and active energy are benchmarked too.
Everything a Fontan athlete tracks, in one place.
Metrics
Resting and walking heart rate, HRV, VO₂ max, heart-rate recovery, blood oxygen and respiratory rate — each charted against both benchmarks.
Training
Fontan-appropriate workout suggestions aimed at your weakest areas, plus a library: zone-2 cardio, gentle intervals, light strength, mobility and recovery breathing.
Activities
Running speed, power and stride length, weekly distance, steps, active energy and recent workouts.
Tests
Labs and cardiopulmonary exercise tests from Apple Health Records or entered by hand, each flagged normal, high or low with a visual range.
Conditions & meds
Medications and diagnoses synced from Health Records, or added manually — with optional medication and weekly check-in reminders.
AI Prognosis
A plain-English summary and per-metric recommendations. Runs fully on-device for free; Premium adds richer AI-written analysis.
Fontan Score
One 0–100 number that tells you how close you are to Super Fontan, and which metrics are holding it back.
Provider export
One tap builds a clean summary to share with your cardiologist or care team, on your terms.
Explorable first
A labelled sample preview lets you look around before granting any health permissions.
Built for iPhone, clear at a glance.
Sample data shown. Tap any screen to enlarge.
Your heart data stays on your phone.
How your data is handled
- Processed on-device. Metrics, labs, meds and conditions are read with your permission and never stored on a server.
- Never sold, never ads. No third-party advertising or tracking SDKs.
- Only what you approve. Revoke access any time in Health or Health Connect settings.
- One opt-in exception: Premium AI Prognosis sends a metrics summary — not your full record — to generate your write-up, then discards it.
Free
- All tracking, benchmarked charts and training
- Fontan Score and on-device prognosis
- Provider export
Premium
- AI-powered prognosis with in-depth, personalized recommendations
- Supports ongoing development for the Fontan community
| Platform | Health source | Metrics | Meds / labs / conditions |
|---|---|---|---|
| iPhone | Apple HealthKit + Health Records (FHIR) | Full, incl. VO₂ max, running dynamics, HR recovery | Synced from Health Records |
| Android | Google Health Connect | Everything Health Connect exposes | Manual entry |
Not medical advice. SuperFontan is for information and general wellness only. It is not a medical device and does not provide diagnosis or treatment. Always confirm training or medication changes with your congenital-cardiology team. In an emergency, call your local emergency number.