- Raw weigh-ins
- The tool uses dated weight observations you supply. It does not import clinical records, photos, or wearable data, and it does not judge body size.
- Smoothed trend
- The same exponential smoothing used in ZenFit progress charts is applied here: each new reading is blended with the previous smoothed value using a 0.45 weighting. Raw readings stay visible. Smoothing reduces the impact of a single high or low day without claiming biological precision.
- Observation length
- Shorter periods produce more cautious conclusions. The tool generally waits for about two weeks before it will call a trend still moving, and about three weeks before it will call a trend genuinely flat.
- Observation density
- More consistently distributed data generally gives a more useful picture than a few isolated readings. A long calendar span with only a handful of clustered weigh-ins is treated as weak evidence.
- Missing data
- Missing days are skipped rather than invented. Daily weighing is not required. The smoother only runs on the weigh-ins you actually enter.
- Quick Check limitations
- Approximate two-week and four-week comparisons provide a rougher interpretation than a detailed dated series. Quick Check results stay more cautious even when the direction looks obvious.
- Context
- Optional answers such as activity, food-tracking completeness, training changes, and measurements are used to prioritize review items. These answers do not prove why the weight trend changed.
- Calorie estimates
- If a current calorie target is mentioned, calorie needs and deficit calculations remain estimates rather than direct measurements.