This site is built as a Progressive Web App. That means your phone or computer browser can install it like an app — icon on the home screen, full-screen use, and quick reopen — without needing an App Store download.

On many phones: open the site in your browser → share / menu → Add to Home Screen (or Install app). On desktop Chrome/Edge, look for an install icon in the address bar.

You still use the same website and login. A PWA is simply a convenient way to launch it — most people have never heard the name, but they already use the pattern on sites like banking or maps.

Consumer “smart” scales that show body fat %, muscle %, and similar numbers usually use bioelectrical impedance analysis (BIA). A small, safe current passes through the body. The scale estimates body water from how that current is resisted, then applies a formula trained on a dataset of people to guess fat mass, lean mass, and percentages.

Those percentages are estimates, not a direct measurement of fat tissue. Different brands, algorithms, and comparison populations can disagree. Hydration, food, alcohol, hard training, and time of day all move the reading.

To make trends useful: weigh under similar conditions (typically morning, after the toilet, before food/drink, same scale). Even then, day-to-day noise is normal — look at weeks, not single mornings. The human dataset the scale compares you to will never match you perfectly.

Your profile activity level scales estimated daily calories. The app uses Mifflin–St Jeor for resting burn (BMR), then multiplies by a standard activity factor to estimate TDEE (total daily energy expenditure — roughly how many kcal you burn in a day at that lifestyle).

In this app the factors are:

• Sedentary (×1.2) — mostly seated work, little or no structured exercise
• Light (×1.375) — light exercise about 1–3 days/week, some daily walking
• Moderate (×1.55) — regular training about 3–5 days/week plus normal daily movement
• Active (×1.725) — hard training most days (about 6–7) or a very active routine
• Very active (×1.9) — intense daily training and/or physically demanding work

These are starting estimates (± a few hundred kcal is common). Most people overestimate activity. If weight is not trending as expected after a couple of weeks of honest logging, try the next lower level. Your cut target is then TDEE minus your maintenance gap %.

Sedentary → light is the highest-value jump. In fitness, the steepest benefit curve is often “zero to something.” Even one session a week gives the body a “use it” signal to hold onto muscle — especially important in a calorie deficit, when unused muscle is easier to lose. Later jumps (e.g. active → very active) add more burn, but smaller relative health gains for most people.

The first 1–3 weeks often drop faster than true fat loss because glycogen stores (and the water bound to them) fall when you eat less or change carbs. That can temporarily put you outside the healthy effort cone even when you are fine.

Curve check leans on recent pace (about the last two weeks) as the sample grows. Feeling stronger in training is a useful real-world signal alongside the scale.

No. The app is a tracking and planning tool for generally healthy adults. See More → Terms & disclaimer. If you have a condition or are unsure about targets, check with a qualified medical practitioner.

Yes. This is the creator’s own Phase 1 journey — real phases, weigh-ins, and how the curve looked throughout the phase until the first weight target was reached.