Read the metric definition
A bar's height is useful for a quick impression, but it is an imprecise way to compare durations. Compact labels and changing scales add another layer of approximation.
Inspect the contributing records
Read the hour label, open individual sessions for minute detail, and confirm that the same dates and datasets are being compared. Note any records that were archived or corrected.
Bar heights are scaled against the largest daily value in the current view, with a minimum scale. Read numeric labels for comparisons across different screenshots; visual height alone is not a stable unit.
Check the relevant distinction
When comparing an exported image with History, verify what the image shows: a session, rhythm, or recent-week total. Those are different quantities, even when all are presented as large numerals.
| Check | Practical meaning |
|---|---|
| Quick glance | Use bar pattern |
| Precise question | Open the record |
Interpret within the data limits
A chart should help locate a question rather than substitute for the underlying record. Use exact timestamps when a decision depends on a specific minute.
Fastly is a lifestyle timer and journal. These notes explain the app and offer reflection prompts. They are not medical advice or a prescribed eating schedule.