Zepbound tracker: know where you are in the week between shots
You take Zepbound once a week. The rest of the week is where the questions live: why day 2 feels heavy, why the food noise comes back before the next shot, whether last week's dose went in on Tuesday or Wednesday.
Setva is on its way to the App Store. The curve calculator on this site is free today.
A Zepbound tracker records each weekly tirzepatide injection with its dose, date and site, then shows where you sit in the seven days between shots. Tirzepatide has a published half-life of about 5 days, so the estimated level in your body never falls to zero between doses, which makes the day of the cycle the more useful question.
Draw the Zepbound curve for free, right in your browser, no signup.
What Zepbound is and how it is dosed
Zepbound is tirzepatide, a dual GIP and GLP-1 receptor agonist. It is a once weekly injection taken on the same day each week, and the label lists doses of 2.5, 5, 7.5, 10, 12.5 and 15 mg. Maintenance is 5, 10 or 15 mg, or 10 or 15 mg for sleep apnea, so 2.5, 7.5 and 12.5 mg are titration steps. The FDA approved it in November 2023 for weight management in adults, and later for moderate to severe obstructive sleep apnea in adults with obesity.
The same molecule is sold as Mounjaro for type 2 diabetes: one drug, two brands, two labels. Setva draws both brands with the same half-life of about 5 days, the figure the Mounjaro label prints and the Zepbound label repeats in its overdosage section. Which dose you take is between you and your prescriber.
What a Zepbound tracker actually needs to do
Most apps stop at a box you tick. That is the easiest part of the week and the least useful. A tracker for a weekly injectable has a harder list.
- Log the shot in two taps, with the mg and the date it really happened
- Hold the last site used, so rotation is not a memory exercise
- Keep the full history, including the weeks the dose changed
- Show where you are in the week, not just that the box is ticked
- Capture a side effect the moment you feel it, not from memory on Sunday
- Follow weight quietly, as a trend line rather than a verdict
Day 2 and day 6 are not the same week
With a half-life of about 5 days, tirzepatide does not clear out between weekly shots. The estimated level builds over the first weeks on a dose until what goes in each week is roughly what clears in that time, then settles into a repeating shape.
A curve makes that shape visible: the rise after the shot, the broad middle, the slow decline into the day before the next one. Setva draws it with a one compartment model and the published half-life. It is an educational estimate, not a measurement of your blood, and never a reason to change what you take.
Side effects, and the day they tend to land on
Nausea, fatigue, constipation, reflux, burping, headache. Whichever ones you get, they rarely spread evenly across the week, and the day they landed on is the part memory loses first.
A log should cost one tap and an intensity level. After a few cycles it shows your own record by day of the cycle, which is a picture rather than a diagnosis. Anything severe, anything that will not let up, and anything your prescribing information flags goes to your prescriber the same day.
One reminder, on the day of the shot
Forgetting a weekly injection is rarely a discipline problem. It is a Wednesday that looked like a Tuesday, a work trip, a pen left in the wrong fridge. The fix is a time sensitive reminder on the right day, plus one follow up if nothing has been logged a few hours later.
One reminder, one nudge, never a third. No streaks to break, no badge counting misses. If you do miss a shot, the timing question goes to your prescriber, never to an app.
Your Zepbound data stays on your iPhone
Doses, injection sites, symptoms and weight are among the most personal things you can write down. In Setva they live on your iPhone and in your own private iCloud, so they follow you to a new phone without passing through a server of ours. There is no account and no login. Product analytics count that a dose was logged, never which drug or which symptom.
How Setva tracks Zepbound
Setva is an iPhone app built around the week between shots, not around your weight. A dose takes two taps, with a body map holding the last sites used. The estimated curve sits at the top of the home screen, today marked on it. Side effects go in through one tap chips, lined up against that same cycle. Weight is a 7 day moving average that reads from Apple Health. Widgets, a Live Activity and an Apple Watch app cover the rest.
Setva is not on the App Store yet. Leave your email on this page and you will hear from us the day it launches, at 79.99 USD a year or 12.99 USD a week, with no trial.
Until then the curve calculator at setva.app/glp-1-calculator is free, needs no account and runs in your browser. Pick Zepbound, enter your dose day, and see the week.
Setva is coming to the App Store. Join the waitlist and you will hear from us once, the day it goes live.
Questions people ask
How long does Zepbound stay in your system?
Setva uses about 5 days, the figure printed in the Mounjaro label and repeated in the overdosage section of the Zepbound label. The pharmacokinetics section of the Zepbound label reports a range of about 5 to 6 days in adults with overweight or obesity, so treat the curve as a band. Either way, the estimated amount in your body falls by roughly half over that period, and because doses are weekly the level never returns to zero in between.
Is a Zepbound tracker different from a Mounjaro tracker?
The molecule is the same, tirzepatide, so the tracking is identical: weekly injection, mg, site, symptoms. Setva draws both brands with the same half-life of about 5 days, so the two curves match.
Can an app tell me the real level of tirzepatide in my blood?
No, and any app claiming to is wrong. A curve is an estimate from published half-life data and the doses you enter. Read it as an educational picture of your week, not a lab result.
What should I do if I miss a Zepbound dose?
That is a question for your prescriber or the prescribing information, not for a tracking app. Setva will never tell you to take a dose early, late, double or split.
Is there a free version?
The curve calculator on this site is free and needs no account. The iPhone app is paid, 79.99 USD a year or 12.99 USD a week, with no trial and no ads.
Is Setva medical advice?
No. Setva is a record keeping and estimation tool. It does not diagnose, does not recommend doses and never replaces your prescriber.
This is an educational estimate based on published half-life data, not a measurement of your blood. Never change your dose without your prescriber.