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A metabolic research platform · iOS

Trace your health,
from gut to plate.

TraceHealth is a measurement tool for the body. Weight, intake, energy, and the slow signals from your gut — all in one calm interface, all corrected by a real agent that reads what you eat the way a dietitian would.

Download for iOS See plans →
Integrates with Apple Health · From $1.25 / week
9:41
TraceHealth
Good afternoon,
you.
Tell TraceHealth anything…
“It feels less like a calorie counter and more like an instrument.” — Beta tester, week 6
±3%agent intake accuracy vs. weighed-portion baseline
14 daysfor adaptive TDEE to settle on your body
1 tapto log a full meal — no databases, no scans
0 adsyour data is yours, sold to nobody

The thesis

Metabolism is personal.
Most apps pretend it isn't.

Calorie formulas were built on group averages from decades ago. TraceHealth reads your intake and your weight curve and recalibrates a TDEE that actually fits — daily, quietly, in the background.

01

Measure what you eat

Talk, snap, or paste. An agent — not a barcode database — reads the meal, asks for the one thing it needs to be sure, and logs accurate macros.

02

Measure what you weigh

Scan the scale, or sync from Apple Health. A smoothed trend line cuts through the daily noise — water, glycogen, the gym yesterday.

03

Trace the rest

Sleep, gut feeling, soreness, mood — the soft signals that turn a spreadsheet into a story about your body.

Features

Built like an instrument,
not a game.

Adaptive TDEE

Your maintenance, recalculated daily.

We solve a small equation between your trend weight and your trend intake to back out the calories your body is actually burning. No more guessing from a height-weight formula.

DAILY TDEE — last 30 days
Last week 2,710 This week 2,840 +4.8%
Apple Health

Reads everything it should, writes nothing it shouldn't.

Steps, workouts, body composition, sleep — pulled in automatically. We don't overwrite anything you didn't ask us to.

APPLE HEALTH · connected
  • Steps12,418read
  • Active energy612 kcalread
  • Body mass262.9 lbread · write
  • Workouts3 this weekread
  • Sleep7h 12mread
  • Body fat %—read
Gut tracing

Notice the food before it notices you.

A daily 5-second check-in: how the gut feels, mood, energy. Patterns surface against what you ate three days ago — not just last night.

SOFT SIGNALS · last 7 days
MTWTFSS
Mood
Gut
Energy
rough okay good
Weight trend

The signal, not the scale.

A Hacker's Diet-style exponential smoothing strips out the daily fluctuations. You see the line your body is actually following.

WEIGHT — 90 days
Scale weight noisy by ±2.4 lb Trend down −7.1 lb

Why it's accurate

Not another photo-to-calorie guess.

Most AI counters look at a photo, hallucinate a number, and move on. Our agent reasons about portion size, cooking method, the oil you didn't mention, the side dish behind the plate — then asks one quick question if it isn't sure.

  • Reads context, not pixels. "Bowl of pho, brisket, large" lands within 4% of weighed.
  • Asks one clarifying question, max. Cooking oil? With rice? Yogurt full or non-fat?
  • Learns your kitchen. Your "usual breakfast" becomes a one-tap log within a week.
  • Shows its work. Every macro number traces back to a portion it can defend.
two eggs scrambled, sourdough toast with butter, half an avocado, black coffee
Reading 4 items · checking your usual portions
Eggs, scrambled (2)180 kcal
Sourdough, 1 slice150 kcal
Butter, ~1 tsp34 kcal
Avocado, ½ medium120 kcal
Black coffee2 kcal
486 kcal · P 22g · F 31g · C 28g
One thing — was the butter salted or unsalted? It only affects sodium, not calories.
salted
✓ Logged. Sodium estimate updated.

Pricing

Two plans.
Both honest.

Pick the rhythm that matches how seriously you want to trace. Cancel anytime — your data exports as CSV in one tap.

Forest

Everything you need to start tracing.

$ 1.25 / week
Billed $65 yearly · cancel anytime
  • Agent-based meal logging
  • Adaptive TDEE
  • Weight & macro trends
  • Apple Health two-way sync
  • Gut & mood check-ins
  • CSV export, always
Start with Forest
Most chosen

Ocean

For people running a real experiment on themselves.

$ 2.50 / week
Billed $130 yearly · cancel anytime
  • Everything in Forest, plus
  • Unlimited agent conversation depth
  • Continuous-glucose & wearables import
  • Weekly written metabolic review
  • Protocol experiments (A/B your diet)
  • Direct line to a registered dietitian, monthly
  • Early access to new instruments
Start with Ocean
New here? Give the agent about two weeks — that's how long it takes to learn your kitchen and for your adaptive TDEE to settle.

The Journal

Long-form notes
on the body.

All entries →
Method · 9 min read

Why we threw out the Mifflin–St Jeor formula.

Group averages from 1990 are a strange way to tell a single human what their body does today. Here's the math we use instead.

May 12, 2026
Field notes · 6 min read

What a registered dietitian taught our agent in week three.

Cooking oil is the single most under-counted ingredient in self-tracked diets. We fixed that with one question.

May 04, 2026
Body · 5 min read

Trend weight, and the 2.4 lb of water you woke up with.

A short essay on exponential smoothing, glycogen, and why your Monday scale is lying to you politely.

Apr 28, 2026

Begin

Start tracing.
Quietly, accurately,
for the next year.

From $1.25 a week. iOS only. Cancel anytime, and your data is always yours to export.

Download on the App Store or
9:41
Today
Today
3-day avg
This week
SUN, MAY 17
M11
T12
W13
T14
F15
S16
S17

The day, so far

32% of goal
CALORIES 640 / 2,000
P PROTEIN 40g / 150g
F FAT 21g / 67g
C CARBS 64g / 200g
WEIGHT TREND
Scan scale
Average262.9 lb
Difference+0.6 lb