Glossary

Terms used in the app and in these docs. If a definition is wrong or missing, open a support ticket.

A

Active amount — the modeled mass of a compound currently in your system, computed from your dose log and the compound's half-life and kinetics shape. The dashboard's per-compound curves plot this. See How half-life curves work.

Affirmative confirmation mode — opt-in tracking mode where past days require an explicit "Mark complete" tap to count toward rolling budgets. Default is passive. See Tracked vs untracked days.

Agent / AI assistant — the chat-driven assistant that can read your data, search the web, and add or edit entries on your behalf. See AI assistant.

AUC (Area Under the Curve) — total exposure to a compound over time, computed by integrating the active-amount curve. Pharmacokinetics term; not displayed prominently in the UI.

B

Bateman function — the math used to model a sub-Q or oral compound: rises (absorption) then falls (elimination). The default for self-injected peptides. See How half-life curves work.

Baseline mode — energy mode where exercise calories are tracked but don't change your daily target. Default. See Exercise energy modes.

Bloodwork — labs you've entered (HbA1c, lipids, hormones, etc.) and their reference ranges. See Bloodwork.

BMR (Basal Metabolic Rate) — calories your body uses at complete rest. Computed by the Mifflin-St Jeor equation from your height, weight, age, and biological sex.

Bolus — kinetics shape with instant peak (IV-like). One of three options for custom compounds. See Kinetics shapes.

C

Compound — any peptide, drug, or substance you dose on a schedule. The app distinguishes canonical compounds (built-in catalog: Tirzepatide, Semaglutide, etc.) from custom compounds (anything you add yourself).

Confirmation mode — see Affirmative / Passive.

Correlation — statistical measure of how two series move together. Reported as Pearson's r in the range -1 to +1. See Pattern insights.

Custom compound — a compound you add yourself, with your own half-life, interval, and kinetics shape. See Custom compounds.

D

DayStatus — a per-day flag (tracked or untracked) that controls whether a day enters rolling-window math. See Tracked vs untracked days.

Day note — free-text entry for a date. Pinned on the weight chart. See Day notes.

Depot — kinetics shape with slow absorption from a tissue depot (e.g., long-acting weeklies, oil-based formulations). One of three options for custom compounds.

Disposition — the tracked/untracked classification for a day. See Tracked vs untracked days.

Dose log — the record of a single administered dose of a compound. See Log a dose.

E

Earn mode — energy mode where exercise calories add to your daily target. For users who set TDEE to sedentary on purpose. See Exercise energy modes.

Endogenous biomarker simulation — physiological model that predicts how your hormones and biomarkers move based on your logged food, doses, exercise, and other inputs. See Endogenous simulation.

Energy mode — controls whether logged exercise raises your daily calorie target. Three modes: baseline (default), earn, and the deprecated hidden. See Exercise energy modes.

ETA — estimated time to your goal weight, projected from your trend line. See Trend & ETA.

F

Fasting event — a single fast (planned or actual). Recurring schedules generate events automatically; one-off fasts are added manually. See Fasting.

FoodData Central — USDA's food and nutrient database. The primary source for food data in the app. See Food data sources.

G

GIPR — gastric inhibitory polypeptide receptor. One of the targets of Tirzepatide and Retatrutide. Mentioned in simulation outputs and AI explanations.

GLP-1 / GLP-1R — glucagon-like peptide 1 / GLP-1 receptor. The main mechanism of Semaglutide, Tirzepatide, Liraglutide, etc.

Glycogen — short-term carb storage in muscle and liver. A 1–2 lb daily weight bounce often comes from glycogen + water shifts.

H

Half-life — time for the active amount of a compound to drop by half. Compound-specific. See How half-life curves work.

Hidden mode — deprecated energy mode that hid exercise burn entirely. New code paths treat it as baseline.

Honest streak — informal name for the tracked vs untracked days system. Skip a day, the math doesn't pretend you ate zero.

I

Insight / Finding — an automatically-detected pattern in your data, surfaced on the dashboard. See Pattern insights.

Interval (compound) — how often you dose. A weekly Tirzepatide is intervalDays: 7.

K

Kinetics shape — bolus, sub-Q, or depot. Determines the shape of the active-amount curve. See Kinetics shapes.

L

Lag — for correlations, how many days to shift one series before computing r. Used to detect "X precedes Y" patterns. See Pattern insights.

Luteal phase — second half of the menstrual cycle (post-ovulation). Often associated with appetite changes and water retention. See Cycle.

M

Macros — protein, fat, carbohydrates, plus calories. The four numbers most macro-tracking apps focus on.

MET (Metabolic Equivalent) — the energy cost of an activity relative to rest. Used to estimate exercise calories burned. kcal = MET × kg × hours × intensity. See Exercise.

Micronutrients — vitamins and minerals beyond the four macros. The food log tracks ~30 of them. See Food data sources.

N

Nutrition score — a 0–100 composite that scores a day against your macro targets, with asymmetric penalties (under-protein is bad, extra protein isn't; over-fat is penalized, under-fat isn't). See Nutrition score.

O

ODE (Ordinary Differential Equation) — the mathematical form used by the endogenous biomarker simulation. Describes how a quantity changes over time as a function of its current state and inputs.

Open Food Facts (OFF) — open-source crowdsourced food database. Used as fallback to USDA. See Food data sources.

P

Partial correlation — correlation between two series after controlling for a third. Used in pattern insights to ask "does this macro predict X beyond total calories?" See Pattern insights.

Passive confirmation mode — default tracking mode where past days auto-track if they have food logs.

Pattern insight — an auto-detected correlation, change-point, or projection in your data. See Pattern insights.

Pearson correlation — the standard linear correlation coefficient (r), range -1 to +1.

Peptide — a short chain of amino acids. Most GLP-1 drugs are peptides. The PEPTIDE_CATALOG in the app's core models contains canonical entries for major GLP-1s.

PK (Pharmacokinetics) — the study of how a drug moves through the body (absorption, distribution, metabolism, elimination). The app's dose curves are PK curves.

PWA (Progressive Web App) — a web app that installs to your home screen and runs like a native app. See Install the app.

R

Recents — automatically-maintained list of foods you've recently logged. Top of the food search page.

Regression line — the best-fit straight line through a set of points. Used for the weight trend line and ETA projection.

Reminder — a per-compound push notification at a chosen time of day, only on dose days. See Log a dose.

Rolling 7-day budget — calorie target computed across the last 7 counted days, not per-day. See Rolling 7-day budget.

S

SignalChart — the unified chart component used on Dashboard and Log. Supports multi-series, time range zoom, and the crosshair plugin.

Simulation / Sim — see Endogenous biomarker simulation.

Spearman correlation — rank-based correlation. Catches monotonic non-linear relationships that Pearson misses.

Stacked doses — multiple doses of the same or different compounds whose curves overlap in time. Modeled correctly via PK addition. See How stacked doses combine.

Sub-Q (subcutaneous) — under-the-skin injection. The default kinetics shape for self-injected peptides.

Symptom — a tracked side effect or feeling, rated 0–10. See Log a symptom.

T

TDEE (Total Daily Energy Expenditure) — total calories your body uses in a day (BMR + activity). The denominator of "calorie deficit" math. Computed from your activity-level setting.

Tracked-pending — today's disposition while it's still in progress. Counts toward budget math; converts to "tracked" or "untracked" at midnight depending on log content and confirmation mode.

Trend line — smoothed regression line through your weight (or any other) data. Filters daily noise. See Trend & ETA.

U

Untracked day — a day excluded from rolling-window math. Either auto-flagged (zero logs in passive mode) or explicit (you marked it). See Tracked vs untracked days.

USDA — see FoodData Central.

W

Waist — circumference measurement at the navel level. Tracked alongside weight; useful for detecting recomp.

Weekly budget — see Rolling 7-day budget.

Weigh-in — a single weight entry. See Log a weigh-in.