How Mounjaro and Wegovy Differ: A Factual Overview
Mounjaro and Wegovy are both GLP-1 medicines, but they are not identical. Understanding the factual differences can help you have a more informed conversation with your prescriber — it does not replace that conversation.
Wegovy (semaglutide)
Wegovy contains semaglutide, a GLP-1 receptor agonist. It works by mimicking a hormone involved in appetite regulation, helping many people feel fuller for longer and reducing overall food intake. It is given as a once-weekly injection using a pre-filled pen. Dose strengths are typically started low and increased gradually, as directed by the prescriber.
Mounjaro (tirzepatide)
Mounjaro contains tirzepatide, which acts on both GLP-1 and GIP receptors — making it a dual receptor agonist. This additional mechanism means it works on two separate appetite-regulating pathways. Like Wegovy, it is a once-weekly injectable, started at a low dose and adjusted over time under prescriber guidance.
What they have in common
- Both are prescription-only medicines — neither can be obtained without a valid prescription
- Both are injectable, once-weekly treatments
- Both are used alongside dietary changes and increased physical activity
- Both carry a black triangle (▼) designation, meaning side effects should be reported to your healthcare professional and your national reporting scheme (such as the UK's Yellow Card scheme)
- Neither is suitable for everyone; suitability is determined by a prescriber
For a more detailed side-by-side look, see our guide to weight loss injections or explore which weight loss jab may be discussed with your prescriber. You may also find it useful to read about factors that inform the best injection choice for an individual and what is known about the safety profiles of weight loss injections.
average weekly weight change in the first 16 weeks of Mounjaro & Wegovy use*
Tracking the right four numbers — weight, waist, protein and dose — turns a noisy chart into a clear story. That's the loop GLP-1 users keep coming back for.
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Tracking Whichever Injection You Have Been Prescribed
Once your prescriber has determined which medicine is right for you, staying consistent with your weekly injections and rotating your injection sites correctly becomes an important part of your routine. This is where GLP Trackr is built to help.
The app's injection-site tracking and rotation feature lets you log each injection — recording the site (abdomen, thigh, or upper arm) and the date — and then suggests where to inject next time based on your history. Rotating sites regularly is generally recommended to avoid discomfort at any one area, and having an automatic prompt removes the need to remember it yourself.
Alongside site tracking, the dose logging feature lets you record exactly which dose strength you took and when, so your treatment history is always clear and easy to bring to your next prescriber appointment. If you ever have questions about your dose or schedule, your prescriber or doctor is the right person to ask — GLP Trackr keeps the record; your prescriber makes the clinical decisions.
You can also explore cost-related questions about weight loss injections or read more on what makes an injection right for a particular person — both useful topics to discuss with your prescriber.
If you experience any side effects that are severe, persistent, or concern you, contact your healthcare professional promptly rather than waiting for your next scheduled appointment.
Ready to take the guesswork out of injection-site rotation? GLP Trackr logs every shot and guides your next one — available free on the App Store and Google Play, with a 7-day trial to get started.
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.
Neither is universally "best" — suitability depends on your individual health history and circumstances. Mounjaro (tirzepatide) acts on two receptors (GLP-1 and GIP), while Wegovy (semaglutide) acts on one (GLP-1). Your prescriber or doctor is the right person to advise which is appropriate for you.
The choice of medicine is made by your prescriber based on your health profile, not personal preference alone. You can discuss your questions and preferences with your prescriber or doctor, who will weigh up the clinical factors and decide what to prescribe.
Both are prescription-only medicines with known side-effect profiles. Neither is suitable for everyone. Your prescriber assesses your individual circumstances before prescribing. If you experience side effects that are severe or persistent, contact your healthcare professional promptly.
GLP Trackr helps you log each injection — recording the site, dose, and date — and suggests your next rotation site automatically. It supports both Mounjaro and Wegovy users, keeping a clear record you can share with your prescriber. It does not provide medical or dosing advice.
Rotating injection sites is generally recommended to avoid discomfort or irritation at any single area. Your prescriber or the patient information leaflet for your specific medicine will provide guidance. GLP Trackr's site-tracking feature can help you keep a consistent rotation record.