A weight tracker that shows the trend, not the verdict

Monday morning, you step on the scale and it's up a pound and a half from Friday. You did everything you were meant to. The shot was on time, you ate decently, you walked. For a moment the whole week feels undone — by a number that will probably be gone by Wednesday.

A weight tracker should make that moment smaller, not bigger.

Why does the daily number bounce around so much?

Because body weight on any given morning includes water, salt, the contents of your gut and the timing of your last meal. None of those are fat, and all of them move.

There's a weekly rhythm too. In a 2014 study in Obesity Facts, adults who weighed themselves daily tended to be heaviest early in the week, after the weekend, with weight drifting down through the weekdays. The authors suggested treating those swings as normal rather than as weight gain.

On a GLP-1 there's an extra wrinkle: eating less and sometimes drinking less, or constipation, can shift the scale from day to day independently of any real change.

Why is the trend more honest than today's weigh-in?

A trend smooths out the noise so you can see direction. One reading answers "what did the scale say this morning?" A 30-day line answers the question you actually care about: "where is this heading?"

Different windows answer different questions:

View	What it's good for
7 days	Spotting a water or salt blip — and seeing it pass
30 days	The month-on-month direction; useful between appointments
90 days	Whether progress has steadied, slowed or picked up, for example across a dose change
1 year	The long view, including plateaus and maintenance

A weekly average sits between them: calmer than any single day, but still responsive.

How should I weigh myself for a cleaner trend?

1. Same conditions each time. Morning, after the bathroom, before eating or drinking, similar clothing.
2. A few mornings a week is plenty. More readings make the average steadier; daily is optional, not required.
3. Use the same scale. Different scales disagree, and that difference can look like a change.
4. Glance at the 30-day view before reacting to any single reading.
5. Let the scale write to Apple Health if it can, so you're not typing numbers in.

What should I read alongside the weight?

On a GLP-1, the scale isn't the whole picture. A 2025 joint advisory from four obesity and nutrition societies puts adequate protein, alongside strength activity, among the priorities for preserving muscle during treatment — so a slower drop with good protein can be a better month than a fast one without it. It's also worth reading weight next to your dose history and side effects: a week of nausea can move the scale in ways that don't reflect real progress.

Progress varies a great deal between people and over time. Your prescriber is the right person to tell you what's expected for you.

What we'd track

1. Weight a few mornings a week, under the same conditions.
2. The weekly average, as your main number.
3. Protein most days, so you can see whether you're losing in a way that protects muscle.
4. Dose changes and side-effect weeks, to explain bumps in the line.

Here's how Holt shows it. The Results screen has your % to goal, your weekly average and a weight chart you can switch between 7 days, 30 days, 90 days and 1 year, with your full weight history underneath. Weigh-ins can sync from Apple Health along with steps and workouts, and when you've had a good stretch Otto will say so — "Keep going!" — without making a single morning into a judgment.

See your weight trend in Holt

Want to know where you stand right now? Our free weight loss percentage calculator works out the same % that Holt shows.