The Best Free App for Weight Loss on Mounjaro or Wegovy

General weight-loss apps are designed for people counting calories in isolation. When you are on a GLP-1 medicine, the picture is more layered: reduced appetite, changing food noise, weekly injections, and side effects that can all influence how your body responds week to week. A tracker built around that reality is simply more useful.

Progress is not just the number on the scale

Weight on a GLP-1 journey can plateau, fluctuate with water retention, or shift more slowly at certain dose stages. Tracking measurements, mood, sleep, and energy alongside weight gives a much more honest view of what is actually happening. Many people find that weeks where the scale barely moves are still weeks where their clothes fit differently or their energy improves significantly.

Consistency is the variable that matters most

Staying consistent with food quality, protein intake, hydration, and movement tends to shape long-term outcomes more than any single week. Logging these habits daily builds a dataset that shows what actually moves results for you — not a generic average, but your own patterns. For a broader look at what to consider when choosing a tracking tool, see our guide to choosing the right weight-loss app and how fitness tracking fits alongside a GLP-1 journey.

Meal planning supports GLP-1 appetite changes

Appetite suppression can make it easy to under-eat protein, which matters for preserving muscle alongside fat loss. Having a meal planning tool that surfaces high-protein, gentle-on-the-stomach options removes a lot of daily guesswork. If exercise is part of your plan, our page on tracking weight loss and exercise together covers how to bring both into one picture.

The feature that tends to make the biggest difference for people on this journey is the week-by-week body transformation view — weight logs, measurements, and trend charts that smooth out daily fluctuations and show genuine progress over time. When a plateau hits, it is the trend line, not the single weigh-in, that tells you what is really happening.

Alongside that, the daily morning check-in takes about 30 seconds: log your weight, rate your mood, energy, food noise, and sleep. Over weeks, the app surfaces correlations — for example, whether higher protein days or better sleep align with stronger results for you personally. It turns scattered daily data into insight you can actually act on.

For meal planning, the AI photo food scan means you point your camera at a meal and get an instant calorie and protein breakdown — no manual searching needed, which matters when appetite is low and you just want to eat and move on. GLP-1-friendly meal plans and a recipe library help fill the week with protein-first options that tend to sit well at lower appetite levels.

Everything feeds into your weight intelligence and plateau forecast — an at-a-glance read of where your journey is heading, built from your own data rather than generic benchmarks. You can also generate a summary report to bring to your prescriber appointments, so your check-ins are grounded in real logged data rather than memory.

GLP Trackr supports both Mounjaro and Wegovy users. For a full overview of tracking your weight-loss journey on a GLP-1 medicine, visit the GLP Trackr weight-loss tracking hub.

GLP Trackr provides tracking and informational support — it is not a substitute for guidance from your prescriber or doctor, who knows your full health history and can advise on your individual progress.

Ready to see your own patterns? Download GLP Trackr on the App Store or Google Play and start your free 7-day trial — no commitment needed to find out what your data actually shows.