Tavita: Drug Interaction Checker & Med Tracker

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  Tavita, a second check for the meds you take every day.

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  My whole prescription, all 14 medicines, read in one scan.

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  A real warning from my own list: two heart medicines that lower heart rate together.

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  Iron and calcium, kept apart so both can absorb.

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  Your whole med and supplement list, checked for risky combinations.

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  See what your food does for your body, and what to add.

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  Your day at a glance: what to take and what's next.

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  One camera for meals, drinks, barcodes, and labels.

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  Water, caffeine, and alcohol in one place.

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  A monthly look at what went well.

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  Small daily wins that stick.

Inspiration

I have stage-5 kidney disease. I've had two transplants, each gave me about eight good years, and now I'm on dialysis. Pills run my day. If they don't work, I see it in my blood work every month.

In my dialysis support group, one question kept coming up: "Why isn't my iron going up? I take it every day." Most of the time something was blocking it. Coffee. Calcium. Another pill taken at the same time. People were doing everything right and still falling behind.

Then I caught myself doing the same thing. I'd been taking iron with meals, right next to my calcium. Months of pills, partly wasted. I built Tavita so nobody else has to find out from a lab result.

What it does

• Checks every pill against everything else you take. Scan your prescription, a bottle, or a label, or type a medicine in. Tavita warns you right away about dangerous drug interactions, and your schedule's safety report covers the milder ones too.
• Keeps clashing pills apart. It builds your daily schedule so pills that block each other, like iron and calcium, are taken at different times. Pairs that help each other, like vitamin C and iron, go together.
• Reminds you what to take and when. No more doing the timing math in your head.
• Shows what your food does for you. Meals are mapped to 15 body systems, so you see what to add, not just what to cut.

Tavita is a second check to bring to your doctor or pharmacist. It doesn't diagnose and it isn't a medical device.

The hard part

I wanted Tavita to be free. The people who need it most are often sick and short on money. I've stood at the pharmacy counter doing that math myself.

But I'm one person with no funding, and the AI features cost me money every time they run. So I made a bet:

• Everything that keeps you safe is free, forever.
• Free users still get one AI-built schedule a month. I pay for it out of pocket.
• PRO covers the extras that cost money to run.

I'm betting the people who get value from PRO will cover the people who can't pay. That's the kind of company I want to run.

How I built it

• React Native and Expo, live on the App Store and Google Play
• Health data stays on your phone. No account, nothing sold.
• I'm not a doctor or pharmacist, so safety checks are grounded in U.S. health databases from the NIH and the FDA
• AI reads labels and arranges timing. It never decides what's safe.
• RevenueCat runs subscriptions and tracks affiliate referrals

What I'm proud of

Tavita found problems on me first. It caught my iron timing. It showed me my diet was barely feeding my heart, the organ people on dialysis are most likely to lose. My kids eat what I eat, so fixing my plate fixed theirs.

What's next

• Lab result tracking, so you can watch changes show up in your blood work
• Wider coverage, so fewer combinations need an estimate
• Household profiles, because one person's routine is usually the family's

Why "Tavita"

Tavita is Samoan for David. It means beloved. I've been given the gift of life twice. This is how I pass it on.

Built With

• anthropic
• claude
• expo.io
• health-connect
• mmkv
• openfda
• react-native
• revenuecat
• rxnorm
• skia
• sqlite
• supabase
• typescript