What it measures
Pinned, a menu bar network monitor for Mac
The free Pinned app shows live download and upload speed in the macOS menu bar. Pinned Pro adds per-app bandwidth, data caps on your real billing cycle, alerts, responsiveness testing and usage history.
Fig. 1 / the readout
22 pt bar
The status item is drawn at a guaranteed fixed width. Measured identical from 0 B/s to 1.4 Gbps, so it never jitters and never shoves the items beside it along the bar.