How readings are taken
YANL combines direct readings from Android with calculations performed on the phone before data is shown in tiles or uploaded to the web.
Three source types
| Badge | Meaning |
|---|---|
| Android | Value comes from an Android system API (cell modem, Wi‑Fi, GPS, etc.) |
| iPerf3 | Value comes from an on-device iPerf3 speed test |
| YANL | Composite tile or value calculated by the app from one or more OS readings |
See the full list in the Metrics reference.
Polling and uploads
- The app samples hardware metrics on a 5-second interval.
- A metrics line is only written to the log when values have changed since the last tick (saves space).
- Every line includes an ISO-8601 datetime so the web replay timeline stays in order.
- You can disable categories (network, Wi‑Fi, location, Bluetooth, etc.) in logging settings — disabled data is not recorded.
What the web viewer shows
The web replay viewer displays the same metric keys and thresholds as the Android app. Status colours (Good / Marginal / Poor) use the same bands on both platforms.
Next
- Derived metrics — values calculated by the app
- Android & iPerf3 sources — official reference links
- Metrics reference — every metric with units and thresholds
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