Mounjaro and Wegovy: What These Injections Are
Both Mounjaro and Wegovy are prescription-only, once-weekly injectable medicines. They are not the same medicine, and they are not interchangeable without prescriber guidance.
Mounjaro (tirzepatide)
Mounjaro contains tirzepatide, a dual GIP and GLP-1 receptor agonist. It is supplied as a pre-filled pen and is typically started at a low dose, with any adjustments made by the prescriber over time. Common injection sites include the abdomen, thigh, and upper arm.
Wegovy (semaglutide)
Wegovy contains semaglutide, a GLP-1 receptor agonist, also supplied as a pre-filled pen for once-weekly injection. As with Mounjaro, dosing and any changes to the schedule are decisions made by the prescriber, not the person taking it.
Why injection-site rotation matters
Rotating injection sites — for example, moving around different areas of the abdomen, or alternating between the abdomen, thigh, and upper arm — is a standard part of managing a weekly injectable routine. Repeatedly injecting the same spot can affect how the medicine is absorbed and may cause localised skin reactions. Your prescriber or the patient information leaflet that came with your pen can advise on technique specific to your medicine.
For a broader look at how these medicines compare factually, see our guide to what the best weight loss injection on the market actually means, or explore commonly asked questions about weight loss injections for more general context.
average weekly weight change in the first 16 weeks of Mounjaro & Wegovy use*
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Tracking Your Injections with GLP Trackr
Staying consistent with a weekly injection schedule — and rotating sites correctly — is easier when you have a record. That is where GLP Trackr is built to help.
Injection-site tracking and rotation suggestions
Every time you inject, you can log the site you used — abdomen, thigh, or upper arm — along with the date, time, and dose strength. GLP Trackr tracks your rotation history and suggests your next site automatically, so you are never guessing where you last injected or trying to remember which side of your abdomen you used two weeks ago.
Dose reminders
A once-weekly schedule sounds simple, but it is easy for a day to blur into the next. GLP Trackr's dose reminders give you a gentle nudge so your injection day stays consistent — because consistency is one of the most practical things you can control on this journey.
If you are just starting to explore how injectable weight management medicines work in general, our overview of weight loss injections covers the basics, and the full weight loss injections hub brings everything together in one place.
GLP Trackr does not sell, supply, or source any medicine. It is a companion app for people who are already prescribed Mounjaro or Wegovy — helping you track your doses, sites, and progress so you can stay on top of your routine and have more informed conversations with your prescriber.
Always follow the guidance of your prescriber or doctor regarding your injection schedule and technique — they know your full medical history. If you experience any injection-site reactions that are severe, persistent, or worrying, contact your healthcare professional promptly.
Log every injection, track your rotation, and never lose your place in your weekly schedule — GLP Trackr is free to try for 7 days on the App Store and Google Play.
What does glptrackr include?
10+ powerful features. One app. Built specifically for Mounjaro and Wegovy users.
Everything your GLP-1 journey needs. Free to try for 7 days.
Morning Check-In
Start every day with a 60-second wellness check-in. Log how you're feeling, track nausea, appetite, energy, and mood — giving you and your care team a complete picture of how your medication is working.
Injection Tracking
Log every dose with a single tap. Track your dose history, phase in your cycle, estimated medication levels, and upcoming injection dates — with reminders so you never miss a scheduled shot.
Hydration Reminders
Staying hydrated is especially important on GLP-1 medications. Set daily water targets, log intake throughout the day, and receive smart nudges when you're falling behind your goal.
Smart Meal Planning
Personalized meal plans built around your current dose phase and side effects. Every meal is GLP-1 optimized — high in protein, gentle on the stomach, and scaled to your reduced appetite.
Recipe Library
Browse 50+ high-protein, GLP-1-friendly recipes filtered by meal type, prep time, and dietary needs. Every recipe includes full nutrition info, step-by-step instructions, and tips for eating with side effects.
Progress Analytics
Beautiful, easy-to-read charts show your weight loss trajectory, weekly nutrition trends, medication responses, and wellbeing scores over time — turning raw data into genuine insights.
AI Meal Scanning
Snap a photo of any meal and get a full nutrition breakdown in seconds — calories, protein, carbs, fat, and fibre. No searching. No manual logging. Just point, snap, and track.
Exercise & Steps
Log walks, workouts, and movement with activity targets that flex with your energy levels. On lower-energy dose days, gentler targets keep you moving without burning out.
Community Support
Connect with thousands of others navigating the same medication journey. Share milestones, ask questions, find accountability partners, and get support from people who truly understand.
Never Forget a Dose Again.
Log your Mounjaro or Wegovy injection in seconds. Track your pen, your dose level, and your injection site — so you always know exactly where you are in your treatment.
Watch Your Body Transform, Week by Week.
Log your weight, measurements, and how you're feeling after each dose. GLPTrackr turns your data into clear, motivating charts that show you how far you've really come.
You're Not on This Journey Alone.
Connect with thousands of real GLP-1 users sharing their wins, side effect tips, and meal ideas. Get the support of people who truly get it — because they're living it too.
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The Most Advanced GLP-1 Brain Ever Built.
The first AI built exclusively for GLP-1 weight loss. Every insight, every meal plan, every prediction trained on one thing only: helping you get the most out of your medication.
Knows Your Cycle
GLPIQ tracks where you are in your injection cycle and adjusts everything around it: lighter meals on nausea days, higher protein when appetite returns, and smarter targets as your medication level shifts.
Predicts Before You Feel It
GLPIQ learns your personal side effect patterns over time. After a few cycles, it starts warning you the morning before a rough day — and adjusts your meal plan automatically.
Finds Your Golden Dose
GLPIQ analyses every dose you've been on: weight loss rate, side effects, food noise, mood, protein adherence and tells you which dose gave you the best results. No other app does this.
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Frequently asked questions.
Mounjaro (tirzepatide) and Wegovy (semaglutide) are among the most widely prescribed injectable weight management medicines available. Both are prescription-only. Which is most appropriate for any individual is a decision for their prescriber or doctor, based on personal health circumstances.
Mounjaro contains tirzepatide, a dual GIP and GLP-1 receptor agonist. Wegovy contains semaglutide, a GLP-1 receptor agonist. Both are once-weekly pre-filled pen injections, but they have different active substances and mechanisms. A prescriber can advise which is suitable for you.
Yes. Rotating sites — such as different areas of the abdomen, thigh, or upper arm — is standard practice for once-weekly injectable medicines. It helps avoid localised skin reactions and supports consistent absorption. Your patient information leaflet or prescriber can guide you on technique.
Yes. GLP Trackr lets you log each injection site, date, time, and dose strength. The app tracks your rotation history and suggests your next site, so you always have a clear record without relying on memory. It is available free to try for 7 days on iOS and Android.
Both are prescription-only medicines obtained through a prescriber and a registered pharmacy. GLP Trackr does not sell, supply, or source either medicine. For guidance on how to obtain a prescription, speak with your prescriber or doctor.