See what your own data actually says.

A private health tracker that finds the patterns in your own logs — sleep, food, supplements, symptoms — across the time lags where cause and effect actually hide.

We'll email you once, when it's on the App Store. No spam, no selling your address.

See how it works ↓
The Traceline Today screen: your day's readiness score and what's different today.
The idea

You've been living in a spreadsheet.

If you already track how you react to methylfolate, aged or fermented foods, caffeine, or a new supplement, you've been doing this by hand — in notes, in your head, in a spreadsheet that never quite answers the question. Traceline is that spreadsheet, grown up: a correlation engine that watches your inputs against your outcomes over time, and tells you honestly when the data is too thin to say.

How it works

Log your days. It finds what actually moved your numbers.

1

Log, calmly

Supplements, meals, symptoms, sleep, HRV and more — in a quiet dashboard built for consistency, not guilt.

2

It scans the lags

The engine compares each input against your outcomes across a range of time lags — because your reactions rarely happen the same hour.

3

You see the pattern

A finding surfaces only when your own data supports it — with a plain-language read on how strong it really is.

What's inside

A whole quantified-self kit, in one calm app.

Correlation engine

Compares your logged inputs against your outcomes across a range of time lags — the core of the whole app.

Calm daily scores

Recovery, Sleep, Nutrition and Stress in plain language — never red-alert pressure.

Experiments

Start a change, close it, and see the before-and-after on your own numbers.

Bring your DNA

Import a 23andMe or AncestryDNA file to record the markers you track — COMT, MTHFR, DAO and more — read entirely on-device.

Apple Health

Sync sleep, HRV and resting heart rate so your day starts already filled in.

Labs & more

Track lab results over time and see a rough, clearly-labeled biological-age estimate from your own trends.

Who it's for

Built for people already self-experimenting.

Slow COMT. MTHFR. Histamine and tyramine. Caffeine that hits differently. If you're the kind of person who already suspects a food or a supplement is doing something — and you want to actually find out, in your own body, rather than guess — this was built for you. It speaks your language without ever telling you what to do.

Privacy

Your data never leaves your phone.

There's no account and no sign-up. Nothing is uploaded, nothing is sold, and there's no tracking of any kind. That isn't a setting you toggle — it's how the app is built.

Honest by design.

On-deviceYour logs live in the app on your phone, full stop.
No accountNothing to sign up for, nothing to log into.
Your callData leaves only if you export it, or opt in to using your own AI key.

Read the full privacy policy →

Honest by design.

Traceline is a self-tracking tool, not a medical device. It shows you patterns in your own data — it doesn't diagnose, prescribe, or tell you what to do. When the evidence is weak, it says so.

Be there when it launches.

Join the waitlist and we'll email you once — the day Traceline is on the App Store.