# Tirzepatide tracker for iPhone: units to draw, shot day and side effects in one place > Track compounded tirzepatide from a vial: units-to-mg math, doses left, weekly shot countdown, rotation, nausea and weight. Peppy is free on iPhone. Source: https://peppytracker.com/trackers/tirzepatide-tracker/ Last updated: 2026-08-30 Tracking compounded tirzepatide means converting your prescribed mg into units on an insulin syringe for your vial's concentration, remembering the weekly shot, rotating sites and counting draws left in the vial. Peppy does the units math, counts down to shot day, suggests the next site on a body map, estimates when the vial runs out, and ties a daily weight and side-effect check-in to every shot. ## What tracking tirzepatide actually involves A tirzepatide tracker app has to handle a unit conversion that the brand pens hide. [Mounjaro](https://peppytracker.com/compounds/tirzepatide-mounjaro/) and [Zepbound](https://peppytracker.com/compounds/tirzepatide-zepbound/) are clicked to a number in mg; [Compounded Tirzepatide](https://peppytracker.com/compounds/tirzepatide-compounded/) is drawn from a multi-dose vial with an insulin syringe, so your dose is a number of _units_ that depends on the concentration your pharmacy filled. Two vials with the same mg but different mL give different unit counts for the same prescribed dose. The things to track are the units for the vial in your fridge, the weekly day, the injection site, and how many draws remain. Peppy's calculator is inline in the protocol editor. Enter the mg in the vial and the mL it holds (or the mg/mL on the label), then your prescribed mg, and it shows "Draw up N units" on a U-100 syringe, with a warning when the volume will not fit in a 1 mL syringe. This is arithmetic, not advice; the mg is your provider's. Try it for compounded tirzepatide: The [compounded semaglutide and tirzepatide units guide](https://peppytracker.com/guides/compounded-semaglutide-tirzepatide-units/) shows the same math by hand, and the standalone [calculator](https://peppytracker.com/calculator/) lives in the app's Calculator screen for quick checks. ## Shot day, rotation and missed doses The Mounjaro and Zepbound labels name the abdomen, thigh and (when someone else injects) the back of the upper arm, and say to rotate with each dose. Peppy's body map divides those into 13 sites and marks the suggested one on the log sheet with "last used 7 days ago" beneath it. Rotation is shared across every protocol, so a compounded tirzepatide shot and a BPC-157 shot never double up on a spot. The [site rotation guide](https://peppytracker.com/guides/injection-site-rotation/) explains the sequence. For a missed shot, there is no compounded-product label; people look to the brand labels and their provider. Mounjaro's and Zepbound's say a missed dose can be taken within 4 days (96 hours) and otherwise skipped, and both allow a change of weekly day as long as two doses are at least 72 hours apart. Peppy shows "OVERDUE" with the elapsed hours on the Today tab so the 96-hour question has an answer, then lets you log late, skip, or add a past dose from the Calendar. See the [missed GLP-1 dose guide](https://peppytracker.com/guides/missed-glp-1-dose/). ## Titration and step-ups Compounded tirzepatide carries no catalog ladder because there is no label for it; your provider writes the steps, usually in units. Titration (Pro) in Peppy takes that list with a duration per step and advances the units on the card, the reminder and the log sheet when each step ends, dropping a marker on the weight chart. If the vial concentration changes at a refill, re-run the calculator: the same mg is a different number of units, and the tracker should show the new one. The [titration schedule tracker guide](https://peppytracker.com/guides/glp-1-titration-schedule-tracker/) covers the setup. ## Side effects and weight The daily check-in scores nausea, constipation, heartburn, sulfur burps and food noise from 1 to 5, takes your weight and how you feel, and a note. Weight can flow in from Apple Health, and every weigh-in you enter is written back. Many people report [nausea](https://peppytracker.com/side-effects/nausea/) and [constipation](https://peppytracker.com/side-effects/constipation/) in the first weeks; daily scores are what show whether they settle. The Progress tab (Pro) draws the weight trend with your goal and step-up markers, a side-effect heat-map lined up against shot days, a feelings chart and an adherence percentage. Export (Pro) produces a PDF or CSV of doses and check-ins for your provider, generated on the device. ## What's still active Tirzepatide's elimination half-life is approximately five days according to the Mounjaro prescribing information (five to six days per Zepbound's). Peppy uses the catalog half-life to draw an "Active in your system" curve that decays through the week and steps up when the next shot lands. It is an estimate from the half-life, not a measurement. ## Frequently asked ### Is there a tirzepatide tracker app for compounded vials? Yes. Peppy is a free iPhone tirzepatide tracker app. Compounded tirzepatide is in the catalog as a weekly vial dosed in units; enter the vial concentration and your dose, and Peppy shows the units to draw, counts down to shot day and logs each shot on a body map. ### How many units is my tirzepatide dose? That depends on the vial's concentration. Peppy's calculator takes mg per vial and mL (or the mg/mL on the label) plus your prescribed mg and shows the units on a U-100 syringe. It is a conversion only; always verify with your prescriber. ### How do I remember my weekly tirzepatide shot? Set the shot day in the protocol and the Today tab counts down. With Pro, Peppy sends a reminder on the day and a missed-dose nudge after 30 minutes, 1 hour or 2 hours, and the Next Shot widget logs it from your Lock Screen. ### Can I see how many tirzepatide doses are left in the vial? Inventory (Pro) counts vials times doses per vial, subtracts each logged shot, and shows 'about 3 doses left, runs out around Oct 3' with a running-low alert. ### Does this app track Mounjaro and Zepbound too? Yes, as brand pens in mg with the label's 2.5 mg ladder. See the Mounjaro tracker and Zepbound tracker pages; you can keep a pen protocol and a compounded protocol side by side. --- Peppy is a tracking tool, not medical advice. Dose calculations are mathematical conversions only. Always follow your prescriber's instructions and verify every draw-up yourself. Peppy is a free iPhone app (Pro subscription optional). App Store: https://apps.apple.com/us/app/peptide-tracker-peppy/id6775005514