Why we built Gavia.

There is a question your gastroenterologist asks at the start of every appointment. It sounds simple. How have the last two weeks been? For most of the millions of Americans living with Crohn's disease and ulcerative colitis, the honest answer is the same: I think … worse? Maybe better? I don't actually remember.

That's the gap.

Not because the answer matters more than the patient does. Because the answer is what unlocks the next decision — a dose change, a colonoscopy, a switch from one biologic to another. Without data, the appointment becomes guesswork on both sides of the desk. With data, the same twelve minutes turn into a structured conversation backed by real numbers, real patterns, and real trends. Two appointments, same disease, two completely different outcomes.

We built Gavia for the patients who walked out of the second appointment and wondered why software had not figured this out yet.

The market has tools. None of them are for you.

There are roughly three categories of software that pretends to help people with Crohn's disease and ulcerative colitis. The first is fitness trackers with a "medical" coat of paint — Apple Health, Fitbit's mood diary, the dozens of habit-tracker clones. These count your steps and your protein. They have nothing to say about urgency, blood, ostomy output, or whether you should have skipped your biologic yesterday.

The second is generic symptom diaries. These let you log "stomach pain" on a five-point scale and add a sad-face emoji. They cannot tell the difference between mild bloating and a partial obstruction. They treat your fistula like a headache.

The third is the legitimately purpose-built tools, of which there are a small number, and which were mostly built ten years ago and have not been meaningfully updated since. The UI is from a different era. The data export is broken. The AI features were retrofitted in 2023 and recommend WebMD.

None of them know that ileocolonic Crohn's is different from pancolonic. None of them know that missing a dose of Humira is not like missing a dose of Vitamin D. None of them know that flare days require less friction, not more.

We started Gavia because the answer to "which app should I download?" was "none of them — write it in a notebook." That's not an acceptable answer in 2026.

The Gavia Standard

Every design decision at Gavia gets weighed against a single test. We call it the Gavia Standard, and it goes like this:

"Real numbers, real patterns, real questions" is doing a lot of heavy lifting in that sentence. Let me unpack it.

Real numbers. Bristol scale consistency. Pain at 4 on a 0–10 scale, peaking at 7 around midnight. Hydration at 68% of your flare-mode goal. Sleep 5 hours 42 minutes with two bathroom interruptions. Humira injection logged at 8:14 AM, left thigh. These are not feelings about your week. These are facts. They are also the language your GI uses internally to chart your course.

Real patterns. Pain trending higher 6–8 hours after dairy in 4 of 5 recent occurrences. BM frequency stable at baseline for 11 days, then doubling for 4. Energy down 30% on days following nights with fewer than 6 hours of sleep. Patterns like these are invisible to memory and obvious to math. Gavia runs the math.

Real questions. Every biweekly report ends with a short list of prepared questions for your next appointment, drawn from your actual data. Questions like: "My fatigue has worsened despite improved BM frequency — should we check ferritin and B12?" That is a question your GI can answer in 20 seconds. "Things feel kind of off lately" is one they cannot.

These are not features. They are floors. Below them, the product doesn't ship.

What "it works" actually requires.

A tool that meets that standard has to clear three engineering bars before it earns a place on your home screen.

It has to work offline. Infusion centers have bad signal. Hospital basements have worse signal. The app has to function with no network at all — every tracking feature, every reminder, every chart. That ruled out a whole class of cloud-dependent architectures the day we drew the first whiteboard sketch. Sync is a backup, not a requirement.

It has to never lose data. If you log a BM at 3:14 PM and the app crashes at 3:14:01, the data is on disk before the crash. We use SQLite locally with PowerSync handling the merge layer to the cloud. Atomic writes. Conflict-free replicated data types where they matter. An hour of careful logging never evaporates because the network went sideways.

It has to respect your time. The morning and evening check-ins take under two minutes each and capture the essentials. The fuller logging — meals, mood, notes, screenings — is there when you want it, not pushed at you when you don't. A streamlined meal log gets a full breakfast into your record in under thirty seconds. The app meets you where you are, not the other way around.

Why the loon.

The bird in our logo is a common loon — genus Gavia, species Gavia immer. We picked it for a specific reason.

Loons are extraordinary divers. They go beneath the surface to see what others cannot. They migrate enormous distances across changing conditions — open water in summer, frozen coastlines in winter. They are quiet on the still lake, but they are present. They make their home in places that other birds have written off as too cold, too remote, too hostile.

That is what it looks like to live with this disease. You learn to navigate changing conditions. You learn to see beneath the surface of your own body — to read signs that nobody around you can read. You build expertise in a condition the rest of the world is squeamish about discussing.

The loon is the symbol of that work. And, frankly, it is more dignified than a smiley-face on a five-point scale.

What we are not building.

It is worth being clear about what Gavia is not, because the IBD app graveyard is full of companies that tried to be everything.

• We are not building a medical device. Gavia does not diagnose anyone. It does not prescribe anyone. It does not replace your gastroenterologist. Every AI feature defers to your care team.
• We are not building a community platform. There are wonderful patient communities out there — Reddit's r/Crohns, Crohn's & Colitis Foundation forums, dozens of Discord servers. We don't need to add a worse version of those.
• We are not building a doctor-discovery directory. We are not building telehealth. We are not building insurance. Those are different products and require different licenses and different ethical structures.

What we are building is a single, durable tool that sits next to you through ten years of disease management. It logs. It analyzes. It prepares you for your appointments. It earns its place on your home screen by being precise enough to match the seriousness of your condition.

The economics.

We are independent. We took no venture capital. We are not partnered with a pharma company. We are not partnered with an insurer. The only customer Gavia has is the person paying for Pro, which means our incentives are exactly aligned with the incentives of the person using the app.

This is a deliberate choice. We watched what happened to half a dozen well-funded health apps over the last decade — they pivoted to selling de-identified data to insurance underwriters, or they got acquired by a pharma giant who quietly turned the user base into a recruitment funnel for clinical trials. We are choosing the smaller business that doesn't have to do that. We sleep better. The product is better.

Tracking is included in the free tier. Pro is $7.50 a month if you pay annually — less than a single biologic copay. That covers the AI infrastructure (which is not free), the engineers, and the support inbox.

The roadmap.

The next six months: better doctor reports, an iPad layout, deeper Apple Health integrations, and the Care Hub — a place to keep your specialist contact info, your insurance card, your last colonoscopy report. We are also working on a HealthKit-compatible export so you can hand your GI a Health record they can read in their EMR.

The next twelve months: an Android version (yes, we know, it's coming), more languages, and a research-grade study where consenting users contribute fully de-identified, aggregated data to academic IBD research — opt-in, clearly explained, controlled by you, not sold.

The ask.

If you have IBD, or you love someone who does, please download Gavia and try it for a week. The bar for whether we keep building this thing is a simple one: does it help. Not in a vague way. In a concrete way. Did your last appointment go better. Did you remember your biologic on time. Did you catch a pattern in your data three weeks before you would have noticed it on your own.

If the answer is yes, tell us. If the answer is no, tell us harder.

We are listening.

— The Gavia team