How Wegovy and Mounjaro Actually Differ
Understanding the factual differences can help you have a more informed conversation with your prescriber — it is not a basis for choosing one yourself.
Different active substances and mechanisms
Wegovy contains semaglutide, a GLP-1 receptor agonist. It works by mimicking a hormone involved in appetite regulation, increasing the sense of fullness and reducing hunger signals. Mounjaro contains tirzepatide, which acts on two receptors — both GLP-1 and GIP — making it a dual agonist. According to information on the electronic Medicines Compendium, both medicines slow gastric emptying to varying degrees, which contributes to reduced appetite; tirzepatide's dual action is a structural difference, though how that translates for any given individual is something only a clinician can assess.
Dose ranges and pen devices
Wegovy is typically started at a low dose (commonly 0.25 mg) and titrated upward by the prescriber over time, with a maintenance dose of 2.4 mg. Mounjaro is similarly started low (commonly 2.5 mg) and adjusted by the prescriber, with strengths up to 15 mg. Both are supplied as pre-filled injection pens. In either case, the titration schedule is set by your prescriber — not something to adjust independently.
Both carry a black triangle (▼)
Both medicines are subject to additional monitoring in many countries. If you experience a side effect, report it through your national reporting scheme (such as the UK's Yellow Card scheme) and speak to your healthcare professional.
For a broader side-by-side look at these two medicines, see our Wegovy vs Mounjaro comparison guide. You may also find it useful to read about choosing between Wegovy or Mounjaro and which might be best for your situation — both pages explore the topic in more depth while keeping the decision firmly with your prescriber.
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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Whichever You're Taking, GLP Trackr Works for Both
GLP Trackr is built for people already on either medicine — it does not recommend one over the other, and it is not a clinical tool. What it does is help you stay consistent and get the most from the journey your prescriber has set out for you.
The most relevant feature here is the insights and analytics dashboard, which brings your dose logs, weight trend, mood, sleep, and side-effect data together so you can actually see what's happening across your treatment — regardless of which medicine you're taking. When you attend a prescriber appointment and the question of your progress (or a possible dose adjustment) comes up, having a clear record matters. The doctor report feature lets you export a clean summary of your journey to share directly.
Alongside that, dose and injection-site logging keeps your weekly schedule organised — useful when you're on a titration plan and want to be certain of what you've taken and when.
If you're also thinking about how these medicines compare to other options, our page on Ozempic or Mounjaro covers another common comparison people research.
Any question about which medicine is right for you, or whether to switch, should always go to your prescriber or doctor — they have the full picture of your health that no app can replicate. GLP Trackr is a tracking companion, not a substitute for clinical guidance.
Ready to bring your whole journey into one place? GLP Trackr is free to try for 7 days — download it on the App Store or Google Play and start logging whichever medicine you're on today.
What does glptrackr include?
10+ powerful features. One app. Built specifically for Mounjaro and Wegovy users.
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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.
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You're Not on This Journey Alone.
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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.
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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.
Wegovy contains semaglutide, a GLP-1 receptor agonist. Mounjaro contains tirzepatide, a dual GIP and GLP-1 receptor agonist. Both are prescription-only, once-weekly injectable medicines used for weight management, but their active substances and mechanisms differ.
Neither is better in a universal sense. Both are prescription-only medicines and which is appropriate for you depends on your individual health history, circumstances, and your prescriber's clinical judgement. This is not a decision to make independently.
Any decision to switch between medicines must be made with your prescriber or doctor. Do not start, stop, or change your medication without clinical guidance. Your prescriber can assess whether a switch is appropriate for your situation.
Yes. GLP Trackr is designed for people already taking either Wegovy or Mounjaro. You can log doses, track injection sites, monitor side effects, and record your progress whichever medicine you have been prescribed.
Yes. Both Wegovy (semaglutide) and Mounjaro (tirzepatide) are prescription-only medicines in most countries. They can only be obtained through a prescriber and a registered pharmacy. Neither is available to buy over the counter.