ELYXIS
A/B testing for humans

Stop guessing.
Know what works
for your body.

You already experiment on yourself — matcha for focus, magnesium for sleep, screens off at nine. Elyxis gives those experiments a method: one variable, a fair schedule, and a verdict worth acting on.

Day X of N  — length set per intervention
Five seconds  a day to log
Private  by design
iOS & Android
Caffeine vs. Matcha
Day 8 of 14
8of 14 days
Leaning: likely helps — 0%

Sharpening with every log. 6 more days for a confident read.

Rate your focus today
7
1 · FOGGY10 · LASER
CAFFEINE VS MATCHA ◦ MAGNESIUM VS NONE ◦ SCREEN-FREE EVENINGS ◦ COLD SHOWERS ◦ CREATINE ◦ MORNING WALKS ◦ NO ALCOHOL ◦ MEDITATION ◦ BLUE-LIGHT GLASSES ◦ FASTED MORNINGS ◦ CAFFEINE VS MATCHA ◦ MAGNESIUM VS NONE ◦ SCREEN-FREE EVENINGS ◦ COLD SHOWERS ◦ CREATINE ◦ MORNING WALKS ◦ NO ALCOHOL ◦ MEDITATION ◦ BLUE-LIGHT GLASSES ◦ FASTED MORNINGS ◦ 
The problem

Your body isn't a spreadsheet. So why track it like one?

Placebo, a bad night's sleep, stress, the weather — they all hide whether a habit truly worked. Humans are terrible at separating signal from coincidence. That's not a willpower problem. It's a math problem.

Correlation ≠ cause

"I slept better on tea nights" — or did you just only have tea on relaxed Sundays? Passive trackers can't tell the difference.

d4

Tracking fatigue

Manual spreadsheets, exports, and DIY math collapse the moment life gets busy. The experiment dies by day four.

$0

Money on faith

People spend $50–100 a month on supplements and gear with zero evidence any of it works for them.

The daily loop

One variable. The right number of days. A real answer.

No streaks. No guilt. A five-second check-in, and the science runs quietly underneath.

STEP 01
A · B

Set the experiment

Pick a template — "Cold Shower vs. Warm Shower for Energy" — or build your own. Elyxis shuffles your schedule so the result can't fool you.

STEP 02
5 SEC

Log in 5 seconds

One nudge a day, one slider. Sleep, steps and screen time sync on their own — nothing to type, nothing to journal.

STEP 03
P(H)

Get the verdict

When the protocol ends — 14, 30 or 45+ days, fitted to the intervention — Elyxis separates the effect from the noise and writes the verdict. If the data can't tell, the verdict says exactly that.

The science, made honest

We isolate the signal hiding in your noise.

β

Confounders, removed

A statistical model separates the habit's effect from your sleep, stress, and screen time — so you see its impact, not the day's mood.

±

Effect size, not false certainty

You get the size of the change and how sure we are — a credible interval, never false precision.

A fair test, by design

Every protocol is designed for you — shuffled A/B blocks, washout days for slow-clearing substances, a length that fits the intervention. Rigor you don't have to think about.

14 NOISY DAYS → ONE CLEAN SIGNALMODEL CONVERGED ✓
◆ Elyxis Science Report

Matcha improved your focus by +1.8 points — but mostly on days you slept under 6 hours. On well-rested days, it made no real difference.

effect +1.8 · 88% likely real · sleep-dependent
Magnesium vs. Baseline for Sleep
Day 8 of 14
NO EFFECT
← HURTS SLEEPHELPS SLEEP →
Leaning: likely helps — 65% · interval still wide
The Live Pulse
Your experiment's daily read

Watch the answer form — day by day.

No waiting in the dark until the last day. Elyxis shows the leaning as it forms — 'likely helping, ~65%' — with its uncertainty, sharpening with every log. And when the data can't tell yet, it says exactly that.

Tap a day to watch the read sharpen.

The Experiment Lab

30+ experiments. One tap to start.

Sleep, focus, calm, energy — start from a science-backed template, or invent your own metric: "Brain Fog," "Caffeine Jitters," anything you can rate.

FOCUS14 DAYS

Caffeine vs. Matcha for Focus

Does L-theanine + caffeine beat your espresso for calm, sustained focus?

Start this experiment
SLEEP14 DAYS

Magnesium vs. Baseline for Sleep

The internet swears by it. Your sleep data will settle it.

Start this experiment
SLEEP14 DAYS

Screen-Free Evenings vs. Standard for Sleep

Does parking the screens after dinner actually deepen your sleep?

Start this experiment
ENERGY14 DAYS

Cold Shower vs. Warm Shower for Energy

Two minutes of cold water vs. your warm routine, scored on morning energy.

Start this experiment
CALM14 DAYS

L-Theanine vs. Baseline for Calm

Green tea's calm molecule, on its own — measured on your 1–10 calm rating.

Start this experiment
MOOD14 DAYS

Afternoon Walk vs. No Walk for Mood

Twenty minutes outside vs. none — does it actually lift your afternoon mood?

Start this experiment
Can't find it? Build your own. Custom conditions, custom 1–10 metrics — measure what matters to you.
Private by design

Your body's data belongs to one person. You.

Health data is encrypted in transit and at rest — and it works for exactly one person: you. We don't sell it, we don't show you ads, and you can export or delete everything with one tap.

Per-metric control — you choose exactly what syncs
Encrypted in transit and at rest
No ads. No data sales. Ever.
Export or delete everything, any time
Pricing

Start free. Upgrade when the data convinces you.

Full Pro for your first 14 days — long enough to finish a fast-acting experiment. Or skip the trial and start free, no credit card at all.

Free
$0forever
1 experiment at a time
Daily 5-second logging + reminders
The verdict, written for humans — on your protocol's last day
Start free
No credit card required — free forever.
14-DAY REVERSE TRIAL
Elyxis Pro
$14.99/month$99/yr · save 45% (~$8.25/mo)
Unlimited experiments — one at a time. That's how you isolate a variable.
Wearable sync — sleep, HRV, steps, screen time
Full Bayesian reports with credible intervals
Interaction insights ("only on short-sleep days")
Experiment history + data export
Try Pro free for 14 days
Card up front · $0 today · first charge on day 15. Cancel in two taps before then and keep the free plan — no dark patterns.
Where Elyxis is going

A personal science engine for a billion bodies.

Today: one careful experiment at a time. Next: adaptive schedules, richer biometrics, and — only with your consent — the largest open library of n-of-1 evidence ever assembled.

Read the vision →

Your first honest answer is
14 days away.

Free to start. Five seconds a day. And if the answer is "it did nothing" — we'll say that too.

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ELYXIS

A/B testing for humans. One change, honestly measured.

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