Weight Loss Tracker
Weight, goal, trend and progress photos in one place, with the doses and meals that explain them.
Published by Pep AI · Weight loss tracker · Updated September 2026
A single weigh-in tells you very little. Water, salt, a late meal and the time of day can move the scale by more than a week of real fat loss, which is why people quit tracking in frustration during a perfectly normal plateau. What matters is the trend across weeks, and that is hard to see in a notes app.
Pep AI keeps your weight history as a chart you can view over 30 days, 90 days, a year or all time, with your goal weight set so you can see how far you have come and what is left. Weigh-ins can come in automatically from a smart scale through Apple Health on iPhone or Health Connect on Android, or you can log them by hand in a couple of taps.
Photos cover what the scale cannot. When weight stalls but your clothes fit differently, progress photos taken in the same spot and light show it. And because doses, food and side effects are recorded in the same app, you can look back at a flat stretch and see what else was going on, whether that was a missed shot, a week of low protein, or a trip.
Pep AI does not set weight targets or tell you how fast to lose. The goal is yours, and your prescriber is the right person to talk to about what is appropriate for you.
The trend, the goal and the reasons behind them
Weight is the outcome everyone watches. Pep AI puts it next to the inputs that move it.
Weight history
Every weigh-in on a chart you can zoom from 30 days to all time, so a bad day reads as a bad day and not a trend.
Goal weight
Set a goal and see where you stand against it. Change it whenever your plan changes.
Automatic weigh-ins
Connect a smart scale through Apple Health on iPhone or Health Connect on Android, or log by hand.
Progress photos
Private photos over time, for the changes a scale cannot show during a plateau.
Doses and food alongside
Your GLP-1 doses, meals and side effects share the timeline, so you can see what surrounded a stall or a drop.
Steps and sleep
Steps and sleep can sync from Apple Health or Health Connect and sit next to weight on the Lifestyle screen.
Frequently asked questions
How often should I weigh myself?+
Whatever you will do consistently. Daily weigh-ins give the richest trend if you read the average rather than each number; weekly works if it is the same day, time and conditions each week. What to avoid is reacting to any single reading.
Why did my weight go up when I'm doing everything right?+
Day-to-day swings of a few pounds are normal and are mostly water, salt, food volume and timing. Plateaus lasting a couple of weeks are also a normal part of weight loss. The trend across several weeks is the number worth judging.
Can Pep AI sync with my smart scale?+
Yes, through Apple Health on iPhone or Health Connect on Android. If your scale writes weight to either, Pep AI can read it.
Can I calculate the percentage I've lost?+
Yes. The free weight loss percentage calculator on this site does it from your starting and current weight, and the goal weight timeline calculator projects how long a goal might take at a given rate.
Is Pep AI a weight loss program?+
No. It is a tracker. It records your weight, doses, food and symptoms and shows how they relate; it does not prescribe a diet, a medication or a rate of loss.
Does Pep AI give medical advice?+
No. Pep AI is a tracking and education app, not a medical device. It records what you log and shows patterns; it does not diagnose, set medical targets or change your treatment. Decisions about your medication stay with your prescriber.
Start tracking smarter today.
Download Pep AI free on iOS and Android.