Family health history is the most powerful, lowest-cost predictor of disease most people own — and almost nobody actually uses it.
In the CDC's 2004 HealthStyles survey of 4,345 U.S. adults, 96.3% said knowing their family health history was important to their health — yet only 29.8% had ever actually gathered it. When researchers repeated the survey with 5,258 people in 2014, after a decade of national awareness campaigns, collection had risen only to 36.9%, and people knew about the same or less than before.
Even alongside modern genetic testing and polygenic risk scores, NIH and CDC reviews find that family health history remains the strongest predictor of risk for many conditions — and for hereditary cancer syndromes, it's often the only one. It's the recommended first step for risk assessment in major clinical guidelines, across cardiovascular disease, diabetes, cancer, and autoimmune conditions.
The Framingham Heart Study found that cardiovascular disease in a parent doubled a person's 8-year risk in men and raised it about 70% in women — independent of cholesterol, blood pressure, weight, and smoking — and the odds rose roughly four-fold (OR 4.1) when a first-degree relative had an early cardiac event before age 55. For diabetes, having one or more first-degree relatives affected makes a person 2–6 times more likely to develop it.
We fill out the same intake forms over and over — and they're rarely revisited or discussed. No one explains why they matter, so we don't realize how important that information actually is, and we under-fill them. And even when a doctor does spot a pattern, it's seldom explained back to us in a way we understand. We leave the appointment no clearer about our own health.
That's the gap Linea fills. It doesn't just find the patterns across your family — it explains what they mean in plain language, so you understand why they matter and walk into your appointment as an informed partner in your own care.
Sources: CDC HealthStyles surveys (2004, n=4,345; 2014, n=5,258); U.S. Surgeon General's Family History Initiative (2004–2005); the Framingham Heart Study; and NIH/CDC reviews of family health history in risk assessment (PubMed Central). Educational only — not medical advice.
Your core health record — about you, your family history, your labs, and your medications, all in one place.
Build your health history here, then print it or share it with your doctor — one complete summary to bring to appointments instead of re-doing the same intake forms every visit.
Add your ancestry and an estimated percentage if you know it (e.g. from a DNA test like 23andMe or AncestryDNA). This lets Analysis surface population-specific research. Add as many as apply.
Add relatives and the conditions that run in your family. The more complete this is, the better your Priorities and Doctor Report become.
Enter values from your bloodwork. The app flags anything outside standard U.S. reference ranges automatically.
Track what you take, why, and who prescribed it.
Past operations and procedures, with dates. These shape your health history and are useful context for any doctor.
Cloud sync across your devices and smarter AI insights are on the roadmap — plus shared family records, where history a relative shares with you can be added to your own family tree automatically. Until then everything stays on this device; use Export backup to move it yourself.
Drop in a lab report, an after-visit summary, a screenshot, or a photo of a paper document. Linea reads it on your device, pulls out what it recognizes, and lines it up to drop into the right places — Labs, Medications, and your conditions. You review and confirm before anything is saved.
What Linea sees in your data — inherited patterns across your family, and the priorities worth raising with your doctor first.
Cross-references your own conditions and labs against your family history to surface what may be inherited, what runs across generations, and what points toward a hereditary syndrome worth raising with a doctor or genetic counselor.
Generated from your family history and labs using published U.S. clinical guidelines. This is a preparation tool to help you partner with your doctor — not a diagnosis.
🔄 Linea automatically checks for updates weekly from the CDC, NIH, and other government and peer-reviewed sources, and we publish those updates to the app periodically.
A clean, comprehensive summary you can print or save as PDF and send ahead of an appointment — so you're not stuck filling out a basic intake form from memory.
The story behind the app.
My health struggles started at 14 — bad stomach pain and no energy that, for a long time, got chalked up to laziness. Years later, I finally learned I had severe pancreatic insufficiency. Meanwhile my cholesterol kept climbing, and the advice was always the same: "lose weight." So I did. It got worse anyway. Then came fatty liver, dyslipidemia, autoimmune issues like psoriasis, and signs of mineral deficiency.
For thirty years, across countless doctors and the same intake forms filled out over and over, no one connected the dots — or really even asked. You rush through the paperwork, the family-history section barely scratches the surface, and then no one talks to you about it anyway.
It was only when I did the research myself, with the help of AI, that the pattern came into focus: so many of these issues were potentially genetic — pieces of one bigger picture that nobody had ever stepped back to see.
That's why this exists. I don't want anyone to sit in a doctor's appointment not knowing what's going on. I want people to walk in with the full picture, understand their own health patterns, and become a true partner in their care — so they can live the healthiest, fullest life possible.
— Adam Breger, founder
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Jot things down during your appointment — questions to ask, what the doctor said, follow-ups. Tap the 🎙️ mic on any note to dictate, or 🎤 Record to capture audio of the visit to listen back to later. Notes stay on this device and ride along in your backup; recordings stay on this device too but aren't included in the JSON backup (use Download to keep a copy).
Snap or add a photo — a prescription label, a rash, a device reading, a paper handout — and add a note to remember what it is. Photos are stored on this device only and included in your backup.
Your care history in one place, split into Past Visits, Upcoming Appointments, and Standalone Notes. Attach an after-visit summary to a visit and Linea pulls out the key points so you can scan quickly, with the full document one tap away. Tick Include in report on anything you want to bring to a specific appointment.