The Best Calorie Counter and Exercise App for People on Mounjaro or Wegovy

Appetite changes are one of the most commonly reported effects of medicines like Mounjaro (tirzepatide) and Wegovy (semaglutide). Many people find they eat significantly less than before — which can make hitting protein and calorie targets harder, not easier. Tracking both food intake and activity in one place helps you spot when your intake is too low relative to how active you are, and supports more informed conversations with your prescriber or doctor about your progress.

What to focus on when tracking calories alongside exercise

• Protein first: When overall food intake drops, protein is the nutrient most at risk of falling short. Many people on GLP-1 medicines aim to prioritise protein at each meal to help preserve lean mass — general guidance from nutrition research tends to suggest higher-protein eating supports body composition during weight loss, though your individual needs are best discussed with your healthcare professional.
• Energy balance, not just restriction: On days you exercise more, your calorie needs shift. Logging steps or activity alongside food helps you see whether your intake is keeping pace.
• Consistency over perfection: Missing a log here and there matters less than building a reliable daily habit. The easier logging is, the more consistent you will be.

Choosing the right app for this

A good calorie counter for someone on a GLP-1 medicine should handle low-appetite days gracefully — meaning logging a small, protein-focused meal should be as frictionless as logging a full one. It should also connect food data to wider progress, not treat it in isolation. If you are weighing up your options, our guide to the best calorie counter apps covers what to look for in more detail, and this dedicated calorie counter app comparison goes deeper on specific features worth comparing.

The fastest way to log food in GLP Trackr is the AI photo scan: point your camera at a meal and the app generates an instant calorie, protein, and macro breakdown — no manual searching required. On low-appetite days when meals are small and varied, this makes the difference between actually logging and giving up. You can also use barcode scanning or a food search for packaged items.

Beyond individual meals, GLP Trackr lets you set daily targets for calories, protein, water, and steps, so you can see at a glance how your food and activity are stacking up against your goals. The insights features draw on your logged data over time — helping you spot patterns like how your energy or food-noise levels relate to what you ate the day before, or whether your step count correlates with how you feel.

All of this feeds into a calorie deficit tracking picture that reflects your whole day, not just one meal in isolation. That joined-up view is what makes the difference when appetite is variable and exercise levels shift week to week.

GLP Trackr is free to try for 7 days — available on the App Store and Google Play. If you want a calorie counter that understands the GLP-1 journey rather than treating it like any other diet app, it is worth seeing what your own data looks like in one place.

GLP Trackr provides general tracking and informational support. It is not a substitute for guidance from your prescriber or doctor — always follow their advice on nutrition, activity, and your treatment.