Semaglutide tracker: see where you are in the week, not just the dose
You take semaglutide once a week, or swallow a tablet every morning, and the week does not feel the same all the way through. Day 2 rarely feels like day 6. A tracker earns its place when it records the dose and shows where in the week you are standing.
Setva is on its way to the App Store. The curve calculator on this site is free today.
A semaglutide tracker logs each dose and plots the estimated level in your body between doses, using the published half-life of about 7 days. It matters because semaglutide builds up over the first weeks, then rises, peaks and falls inside every dosing week, so one dose can feel different on day 2 than on day 6.
Draw the Semaglutide curve for free, right in your browser, no signup.
What semaglutide is and how it is dosed
Semaglutide is a GLP-1 receptor agonist, approved by the FDA since December 2017. It is sold as Ozempic and Wegovy for weekly injection, and as a daily tablet under the Rybelsus, Ozempic and Wegovy names.
The weekly pen comes in steps of 0.25, 0.5, 1.0, 1.7, 2.0, 2.4 and 7.2 mg, depending on the brand and the label: Ozempic tops out at 2 mg, Wegovy at 2.4 mg or 7.2 mg. Tablets run 3 mg to 14 mg for Rybelsus and 1.5 mg to 25 mg for the Ozempic and Wegovy tablets. The published elimination half-life is about 7 days and belongs to the molecule, not the form you take. What changes is the interval between doses, and that changes the shape of the line.
Setva never suggests a dose. Which strength you take is a conversation with your prescriber.
Why one week is never one flat week
A weekly drug with a 7 day half-life does two things at once. Inside each week the level climbs after the dose, peaks, then falls back. Across the first weeks every dose lands on what is left of the last one, so the line drifts upward for roughly four to five weeks before it settles on an unchanged strength.
So the same 1 mg can feel like two different weeks inside one month, and a tracker that only keeps dates cannot show it. One that draws the curve gives you a frame: day 3 near the top, day 6 on the way down. It is an educational estimate from published half-life data, not a measurement of your blood.
What a semaglutide tracker actually needs to do
Most trackers here are a date stamp with a logo. What earns a place on your home screen:
- Log a dose in two taps, on the day it happened
- Keep the dose in mg, so the record survives a change of strength
- Rotate injection sites and show which one you used last
- Plot the estimated level between doses from the published half-life
- Record side effects fast enough that you do it on a rough day
- Show weight as a trend, not a daily verdict
- Remind you once on dose day, then stop
Side effects read better against the day of the cycle
Nausea, fatigue, reflux, constipation and headache are the ones people log most. Lined up against the day of the dosing week they become a pattern you can plan around, and knowing the rough patch lands on day 2 beats knowing you feel bad sometimes.
Setva logs symptoms as one tap chips with an intensity and lays them over the day of your cycle. It reports what you recorded, it does not diagnose, and anything sharp or new goes to your prescriber.
The reminder problem, and one honest fix
Weekly medication is easy to miss for a boring reason: nothing about an ordinary Thursday announces itself. You notice days later, when the estimated level has already dipped.
Setva sends one time-sensitive notification on your dose day. If you have not logged it a few hours later, it nudges you once more. That is the end of it. No third alarm, no streak, no lecture. A missed dose is a question for your prescriber.
Your log does not leave your iPhone
This is health data plenty of people keep to themselves. Setva has no accounts and no server of ours. What you record lives on your iPhone and in your own private iCloud, which is how it reaches your next phone without passing through us.
Weight can sync with Apple Health if you turn that on. Nothing about your drug or your symptoms goes to a third party.
How Setva tracks semaglutide
Setva is an iPhone app built around the two things this page describes: a two tap dose log, and the estimated curve at the top of the screen. It covers weekly pens and daily tablets, with body map site rotation, one tap side effect chips with patterns by day of the cycle, weight with a 7 day moving average, widgets, a Live Activity on dose day and an Apple Watch app.
It is not in the App Store yet. The waitlist is how you hear on launch day, at 79.99 USD a year or 12.99 USD a week, with no trial.
For the curve part today, the free curve calculator needs no account and runs in your browser.
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 semaglutide stay in your system?
The published half-life is about 7 days, so the estimated level roughly halves each week after your last dose and is a small fraction of the peak by about week five. That is an estimate, not a blood test. Ask your prescriber about your own case.
How long until semaglutide reaches a steady level?
Doses come weekly and the half-life is about 7 days, so each one stacks on what is left of the last. The estimated level flattens out after roughly four to five weeks, and a change of strength starts the same climb over.
I take the tablet, not the injection. Does this apply?
Yes. The half-life is the same 7 days either way, but a daily tablet builds a flatter line than a weekly pen. Setva and the calculator handle both.
What happens if I log a dose late?
Enter the real date and time and the curve redraws around what happened, dip included. The app never tells you to change, skip, split or double a dose. Timing questions belong with your prescriber.
Does a tracker measure the semaglutide in my blood?
No. It draws an estimate from published half-life data and the dates you enter. That is educational, not a lab result.
Does it work with Ozempic or Wegovy?
Yes. Both are semaglutide, so they share the same half-life and the same curve. Setva stores the brand and strength you were prescribed.
Where do these numbers come from?
FDA prescribing information on DailyMed and FDA approval letters. When a drug has no reliable published figure, Setva says so instead of drawing a curve.
This is an educational estimate based on published half-life data, not a measurement of your blood. Never change your dose without your prescriber.