The Best Free Macro and Calorie Tracker for Your GLP-1 Journey

GLP-1 and dual GIP/GLP-1 medicines like Wegovy (semaglutide) and Mounjaro (tirzepatide) commonly reduce appetite and increase feelings of fullness. Many people find they eat noticeably less — which sounds straightforward, but it creates a specific nutritional challenge: eating less while still meeting protein needs, staying hydrated, and avoiding a deficit so steep it affects energy or muscle mass.

Protein is the priority macro

Protein supports muscle retention during weight loss and tends to keep hunger lower for longer. Most nutrition guidance for people on reduced-calorie diets suggests prioritising it at every meal, though a personalised target should come from your healthcare professional rather than a generic number. A free macro tracker helps you see at a glance whether your protein is on track each day — something that is easy to misjudge when portions are small.

Calories still count, even when appetite is low

Reduced appetite is not the same as optimal intake. Some people on GLP-1 medicines eat far too little without realising it, while others find that certain foods (often calorie-dense, low-protein options) slip in easily. Logging what you eat removes the guesswork and gives you real data rather than estimates.

Macros beyond protein: carbs, fat and fibre

Carbohydrate and fat intake influence energy, digestion, and how well you feel day to day. Fibre in particular matters because slower gastric emptying — a commonly reported effect of these medicines — can make digestive comfort sensitive to what you eat. Tracking gives you a picture of the full diet, not just calories alone.

For a deeper look at how to use these numbers on a GLP-1 plan, the GLP Trackr calorie calculator hub covers how to think about your energy needs in context. If you want to focus specifically on macros, the free macro calculator walks through the numbers in more detail, and our guide to what a macro tracker actually does is a useful starting point.

GLP Trackr was built specifically for people on Mounjaro and Wegovy, which means food logging is designed around the realities of GLP-1 eating — not around a standard calorie-counting app that assumes normal appetite and large portions.

AI photo scan: the fastest way to log a meal

The standout food-logging feature is the AI photo scan. Point your camera at your plate and GLP Trackr estimates the calories, protein, carbohydrates, fat, and fibre automatically — no manual searching required. When appetite is low and meals are small, the last thing you want is a friction-filled logging process. Snap, confirm, done.

Barcode scan and manual search

For packaged foods, the barcode scanner pulls nutrition data instantly. A manual search is there for everything else. All three methods feed into the same daily macro and calorie totals, so your log is complete regardless of what or where you eat.

Set your own targets

Within the app you can set personal targets for calories, protein, water, fibre, and steps. These are your targets to define — GLP Trackr tracks against them and shows your progress through the day. General educational ranges are a useful starting point, but your prescriber or doctor is the right person to help you settle on numbers that fit your individual situation.

For a broader comparison of tracking options, see our guide to the best macro and calorie tracker app for GLP-1 users.

GLP Trackr is free to download and includes a 7-day free trial — available on the App Store and Google Play. If tracking what you eat has felt like a chore up to now, the photo scan alone tends to change that. Give it a try and see how your protein and calorie picture actually looks across a typical week.