React · SwiftUI · agent guides
Meter
A level in a range as a row of LED segments coloured by position (green, amber, red); a change sweeps segment by segment from the old edge to the new.
Use it for
- A measurement that sits in a known range: storage used, battery, signal, a quota.
Don't use it for
- A task's progress (use progress), or a value someone sets (use a slider).