How These Injections Work and Why Rotation Matters
Mounjaro and Wegovy act on appetite-regulating pathways in the body. Mounjaro (tirzepatide) is a dual GIP and GLP-1 receptor agonist, while Wegovy (semaglutide) acts on the GLP-1 pathway. Both are supplied as pre-filled pens designed for once-weekly self-injection. According to the electronic Medicines Compendium, common injection sites are the abdomen, front of the thigh, or upper arm.
Why rotating your injection site matters
Repeatedly injecting into exactly the same spot can cause localised skin changes over time. Rotating between different areas — and different positions within each area — helps keep tissue healthy and supports consistent absorption. Your prescriber or doctor, or the patient information leaflet that came with your pen, will guide you on technique and any site-specific advice.
Keeping track of your schedule
Because these injections are once-weekly, it is easy to lose track of which day you last injected, which site you used, and what dose strength is current. A clear record helps you stay consistent and gives you useful information to share at your next prescriber appointment. If you are new to self-injection or want a broader overview, the weight loss injections guide covers the wider landscape. You may also find it useful to read about how weight loss injections generally work and what the commonly discussed injectable options look like in practice.
average weekly weight change in the first 16 weeks of Mounjaro & Wegovy use*
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Tracking Your Injections with GLP Trackr
The most immediate way GLP Trackr supports your injection routine is through its injection-site tracking and rotation feature. Each time you inject, you log the site you used — abdomen, thigh, or upper arm — and the app keeps a history so it can suggest your next rotation automatically. That removes one more thing to remember from your weekly routine.
Alongside site tracking, the dose logging tool records the date, time, and dose strength of each injection in one place. If you ever need to check when your last shot was, or want to bring a clear record to your prescriber, it is all there. Gentle dose reminders mean your weekly schedule stays on track even on a busy week.
If you are also curious about the broader topic of accessing weight loss injections — for example, understanding what being prescribed one involves — that page covers what to expect in general terms.
GLP Trackr is available free to download on the App Store and Google Play, with a 7-day free trial. Log your first injection, let the app suggest your next site, and see how straightforward staying consistent can be.
Always follow the guidance of your prescriber or doctor regarding injection technique, dose, and schedule — they know your full medical history. If you experience a severe or persistent reaction at an injection site, or any symptom that concerns you, contact your healthcare professional promptly. GLP Trackr helps you record your journey so you can have informed conversations with your care team; it is not a substitute for their advice.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
Common injection sites are the abdomen, the front of the thigh, and the upper arm. Your prescriber or doctor and the patient information leaflet supplied with your pen will guide you on the correct technique for each site.
Rotating sites helps prevent localised skin changes that can occur from repeated injections in the same spot, and supports consistent absorption of the medicine. Your prescriber or the leaflet with your pen can advise on a rotation pattern.
GLP Trackr lets you log each injection site after every dose. The app tracks your rotation history and suggests which site to use next, so you always have an accurate record without having to remember it yourself.
Mild, short-lived redness or discomfort at the injection site is commonly reported. If a reaction is severe, persistent, or worrying, contact your healthcare professional promptly. They can assess what is happening and advise accordingly.
Yes. GLP Trackr includes dose reminders that you can set to match your weekly injection schedule, helping you stay consistent without relying on memory alone. Any changes to your schedule should be agreed with your prescriber.