Calculated by the app

Most tiles show values straight from Android or iPerf3. The app also derives these before display and logging:

Derived value	What it means	How we work it out
RX power	Received RF power, in easier-to-read units	Converted from signal strength (dBm) into watts and scaled to W / mW / µW / nW / pW. It’s a restatement of signal strength, not a separate measurement.
Distance to tower	Rough range to the serving LTE cell	Estimated from the cell’s timing-advance value. A ballpark figure, LTE only, and often blank, because the phone only reports timing advance while actively connected.
Wi‑Fi throughput	Wi‑Fi download or upload speed	Inferred, not reported directly: Android gives total and mobile data usage, so we take the Wi‑Fi share as the difference.
Live Mbps	Real-time throughput on charts	Worked out from how many bytes moved between one-second samples.
Average C/N₀	GNSS signal quality	The average signal-to-noise of the satellites actually used in the position fix.
Data age	How fresh a network scan is	How long ago the reading came from the hardware.
Chart trend lines	Smoothed trends and momentum on charts	Standard moving-average and momentum indicators, calculated on the device from recent history (app charts only).

These appear in tiles or charts labelled with the underlying metric (e.g. Wi‑Fi DL is marked YANL in the Metrics reference because of the Total − Mobile step).

Derived values are estimates built on the raw readings, so they inherit the same freshness rules: when the underlying source is stale or unavailable, the derived tile blanks rather than showing an out-of-date figure. See Data quality & real-world behaviour.

Where the raw values come from

For the underlying modem and OS readings (before derivation), see Where the readings come from.