Known, unknown, and estimated
- Known: Halflife's current App Store listing documents injection logs, schedules, vial inventory, sites, symptoms, weight, and estimated curves.
- Known: FDA prescribing information reports an approximately 5-day elimination half-life for tirzepatide.
- Unknown: a dose log cannot establish an individual's exact concentration, clinical response, or cause of a symptom.
- Estimate: any remaining-level curve is a model based on logged events and published population pharmacokinetics.
Why this page is separate from a general GLP-1 tracker
The live United States Google results for “tirzepatide tracker app” are dominated by App Store listings, Shotsy, Glapp, and community discussions. Searchers are asking for a product that explicitly names tirzepatide, not a generic medication reminder. This page answers that narrow intent while the GLP-1 tracker guide remains the broader category page.
The tirzepatide record to preserve
Injection event
Date, time, amount, unit, route, site, and completion status.
Weekly context
Planned versus completed events, delays, and a consistent timeline.
Supply context
Vial or pen record, remaining supply estimate, and projected runway.
Observations
Weight and timestamped symptoms kept separate from causal conclusions.
What the five-day half-life means
The FDA label reports an elimination half-life of approximately five days, which supports once-weekly administration. A simple first-order model can illustrate decay and accumulation, but real exposure varies among individuals. Use the curve to organize questions and records, never to change prescribed treatment.
Primary sources: FDA Mounjaro prescribing information and Halflife App Store listing.
Questions this tracker can and cannot answer
It can answer: When was the event logged? Which site and supply record were attached? Was it completed, delayed, or skipped? What does the selected model estimate?
It cannot answer: What is the exact concentration in this individual? Did tirzepatide cause a specific symptom? What treatment change is appropriate? Those require qualified clinical assessment.
Keep the complete record in one place
Halflife - Peptide & GLP-1 Log organizes logs, schedules, vial inventory, injection sites, symptoms, and clearly labeled model estimates on iPhone.
Download Halflife - Peptide & GLP-1 Log