Lemma Health
Personal Health Experiments
Lemma Health app on iPhone showing daily symptom tracking

Stop Guessing.
Learn what helps.

Most people with chronic conditions are already trying things — diet changes, supplements, routines. Lemma helps you track what you're trying and spot what's actually easing your symptoms.

For people managing chronic conditions
Currently supported:
Eczema (Atopic dermatitis) Brain fog (Mental fatigue) Eye floaters Tinnitus Hypertension (High blood pressure) Anxiety

Lemma Health helps you understand what may help your chronic condition by spotting patterns, testing changes, and learning from your data over time. It does not provide medical advice or replace a clinician.

Your journey, simplified

Try → Test → Track → Learn

Try something new
Pick a treatment or change you want to try for yourself.
Set up a test
We help you create a test to see if the change helps.
Track consistently
Check in daily and monitor your progress.
Learn what works
Get simple results and learn what helps.

How it works

Simple steps that take you from "maybe" to "I know".

Your path
Current you

Answer a few onboarding questions so Lemma Health understands where you're starting from

Choose what to test

Pick what you want to try and how you'll measure success

Run the experiment

Check in daily and monitor your progress

Get results

See whether it helped, hurt, or was inconclusive

New you

Decide whether to adopt the change as your new baseline

We handle the complexity
  • 🔎 Determine your starting point
  • 💡 Suggest changes to try
  • 🧪 Set up the experiment
  • 🔍 Track confounding factors
  • 🗓️ Remind you to check in
  • 📈 Explain results in plain English

Lemma Health helps you learn from your data over time. It does not provide medical advice or replace a clinician.

Get started in under a minute

Lemma Health guides you from baseline to results without setup pain.

Start my experiment
Onboarding
Help us understand where you're starting from
Experiment setup and baseline screenshot
Create an experiment
Choose what to test and how to measure success
Daily check-in screenshot
Daily check-in
One minute a day, no guesswork
Daily check-in screenshot

Designed for personal health experiments

Chronic conditions aren't simple

There are a lot of variables that can affect your results. We track context like sleep, stress, and triggers, and account for them so your results are as accurate as possible.

Understand where you're starting from

We understand where you're starting from so we can set a baseline for you to compare against. "Future you" vs. "current you."

Guided tests

Experiments can be complicated. We take all the guesswork out of it so you can focus on what you're trying to test.

Plain-language results

You get a clear summary of what likely helped, what didn't, and when it's still too early to tell.

Better than going it alone

Most apps just let you log symptoms. Lemma Health actually tells you what's working — and how sure you can be.

What you can do
Lemma Health
Bearable / Daylio
Self‑tracking
Know sooner if a treatment is working
Clear signals within days, not months of guessing
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See the real odds it's actually helping
Smart math gives you a real probability — not just a gut feeling
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Catch it if something makes things worse
Get a heads-up before a bad experiment drags on
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Quick daily check-ins under a minute
A simple question each day — no clipboard required
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See what's worked for others like you
Browse real success rates from people with your condition
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Filter out things that might be skewing results
Stress, sleep, weather — we track them so your results stay clean
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~ = possible but requires manual effort

Built for trust

Health disclaimer
Lemma Health is for tracking and personal experimentation. It does not provide medical advice, diagnosis, or treatment recommendations. If you have urgent symptoms, seek professional care.
Privacy and HIPAA compliant

We treat your health data with care. We minimize what we collect, protect it in transit and at rest, and design features to be privacy-first.

  • ● Privacy-first defaults and clear controls
  • ● Transparent data handling and retention
  • ● HIPAA-compliant data infrastructure
Ready to start your first experiment?
It takes about a minute to set up, and your future self will thank you.
Download on the App Store

Frequently Asked Questions

Can you really determine what's working faster than current methods?

Yes. Lemma Health uses Bayesian statistics to learn what is helping each person faster than methods that start from zero. A regular A/B test or simple correlation often treats everyone the same at the beginning. We do not. Each person starts with their own history of symptoms, treatments, and check-ins, which becomes their priors. As new daily data comes in, we update those priors to estimate what is most likely working for you sooner.

Is Lemma Health a symptom tracker?

Lemma Health includes symptom tracking, but it is more than a symptom tracker. Most symptom tracker apps help you record how you feel. Lemma Health helps you run personal health experiments, track symptoms over time, and understand what may be helping or making symptoms worse.

Is Lemma Health for chronic conditions?

Yes. Lemma Health is designed for people managing chronic conditions, recurring symptoms, or long-term health issues. It helps you track symptoms, treatments, routines, lifestyle changes, and daily check-ins so you can learn what works for your body over time.

Can Lemma Health help me figure out what is causing my symptoms?

Lemma Health can help you identify patterns between symptoms and possible triggers, treatments, routines, or lifestyle changes. It does not diagnose medical conditions, but it gives you a structured way to test changes and understand what may be affecting your symptoms.

How is Lemma Health different from a regular health tracking app?

Most health tracking apps collect data. Lemma Health helps you learn from your data. It combines symptom tracking, treatment tracking, personal experiments, AI insights, and statistical analysis to help you understand what is most likely working for you.

What can I track in Lemma Health?

You can track symptoms, treatments, supplements, medications, skincare routines, diet changes, sleep, exercise, stress, wearable data, and daily notes. Lemma Health helps connect these inputs to your symptom changes over time.

Does Lemma Health give medical advice?

No. Lemma Health does not diagnose, treat, prescribe, or replace a doctor. It helps you organize your health data, track symptoms, and understand patterns so you can have more informed conversations with a qualified healthcare professional.

Do I need to understand statistics to use Lemma Health?

No. Lemma Health uses Bayesian statistics and AI insights in the background, but you do not need to understand statistics to use it. The app turns your check-ins and symptom data into simple insights about what may be helping you.