Understanding the Options: Mounjaro and Wegovy
Both Mounjaro and Wegovy are prescription-only, once-weekly injectable medicines used in weight management. They work differently at a biological level, which is one reason why suitability varies from person to person.
Mounjaro (tirzepatide)
Mounjaro's active substance is tirzepatide, which acts on two appetite-regulating pathways — GLP-1 and GIP receptors. It is supplied as a pre-filled pen and is started at a low dose, with any adjustments made by a prescriber over time. As a relatively newer medicine, it carries additional monitoring requirements; any side effects should be reported to your healthcare professional and to your national reporting scheme (such as the UK's Yellow Card scheme).
Wegovy (semaglutide)
Wegovy's active substance is semaglutide, a GLP-1 receptor agonist. Like Mounjaro, it is a once-weekly injection supplied in pre-filled pens, started at a low dose with prescriber-led titration. It also carries additional monitoring requirements.
Why "best" is the wrong question
Neither medicine is universally superior. Suitability depends on factors including your medical history, other conditions or medications, and your prescriber's clinical judgement. Questions like "what weight loss injection is the safest for me" or "which works best for me" are exactly the kinds of questions to bring to your prescriber or doctor — they have your full picture.
If you are researching weight loss injections more broadly, our overview of weight loss injections covers the general landscape, and you can also read more about how to think about which injection might suit you as a starting point for that conversation with your prescriber.
For general background on how these medicines are used, see the weight loss injection guide on this site.
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.
AI Meal Tracking. Built for GLP 1 Appetites.
Point your camera at any meal and let our AI do the rest. Breakfast, doses, weight, mood all tracked in seconds.
How GLP Trackr Helps — Whichever You Are Prescribed
GLP Trackr is built for people already prescribed Mounjaro or Wegovy, and it supports both medicines equally. The app does not influence which injection you take — that is always your prescriber's decision — but once you are on your prescribed medicine, it helps you stay consistent and informed.
Injection-site tracking and rotation
The most practical place to start is site rotation. Common injection sites include the abdomen, thigh, and upper arm, and rotating between them is generally recommended to support skin health. GLP Trackr logs each site you use and suggests your next rotation automatically — so you never have to remember where you last injected.
Dose and schedule logging
With a once-weekly injection, it is easy to lose track of exactly when your last dose was given. The app lets you log each injection — including the dose strength and date — and set reminders so your weekly schedule stays on track.
If you want to explore what getting started with an injection involves, the practical guide to weight loss injection access may be a useful read alongside your prescriber conversations.
Always follow the guidance of your prescriber or doctor — they know your full medical history and are best placed to advise on any decisions about your treatment. GLP Trackr records your journey so you can have richer, more informed conversations at your appointments; it is not a substitute for their clinical advice.
Whichever medicine you have been prescribed, GLP Trackr is ready to help you track it. Download it free on the App Store or Google Play and explore everything it offers with a 7-day free trial.
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.
Download on the App Store Download on the Google Play
Founding Member Offer
One plan. Everything included. No hidden extras.
Founding Member
Exclusive Offer
Join the first 1,000 membersand lock in our lowest ever price
Offer expires in:
786 of 1000 founding spots remaining
50% OFF
Lifetime Price Lock
Never pay full price • Forever
🔒 No credit card required • Cancel anytime
Premium
Ad-free- Track weight, meals, water, exercise, & sleep
- Log doses, injection sites, & side effects
- 60-second daily morning check-in
- AI meal scanning & barcode scanning
- Personalised AI meal plans & recipes
- Golden Dose Finder AI
- Medication Clock — real-time level tracking
- Daily Brief and predictive side effects
- Full insights & weekly transformation cards
- Unlimited progress photos
- Doctor PDF export & body measurements
- Community Access—Connect with GLP-1 users
Powered by
🔒 No credit card required • Cancel anytime
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.
Download glptrackr today.
Available on iOS and Android. 7-day free trial, no credit card needed.
Frequently asked questions.
There is no universally best weight loss injection. Mounjaro (tirzepatide) and Wegovy (semaglutide) are both commonly prescribed once-weekly injectables, but suitability depends on individual health factors. Your prescriber or doctor is the right person to determine which is appropriate for you.
Both Mounjaro and Wegovy are prescription-only medicines prescribed when a clinician judges the benefits appropriate for an individual. Safety and suitability vary by person and medical history. Always discuss any concerns about safety with your prescriber or doctor before or during treatment.
That decision belongs with your prescriber, who will consider your health history, any other medicines you take, and your individual circumstances. No app or website can make that determination — it requires a clinical assessment by a qualified healthcare professional.
Yes. Wegovy contains semaglutide, a GLP-1 receptor agonist. Mounjaro contains tirzepatide, which acts on both GLP-1 and GIP receptors. Both are once-weekly injectables, but their mechanisms differ — which is one reason prescriber-led selection matters.
Yes. GLP Trackr supports both Mounjaro and Wegovy users. It logs injection sites, suggests rotation, records dose and date, and sends reminders — helping you stay consistent with your prescribed treatment. It is a tracking tool, not a medical service.