Benchmark deviations compare each device with the median of up to 200 preceding retained observations. At least 30 baseline observations are needed. A 5% decline is a warning signal; classification also considers repeated declines, heartbeat age, and indexed failures. Repeated observations may contain unchanged benchmark values.

“Healthy” describes the available signals, not guaranteed earnings or uptime. A delayed heartbeat does not prove a phone is offline. Telemetry older than 30 minutes is marked stale. Failure counts are cumulative indexed counts, not a 24-hour rate. The last-failure timestamp indicates recency; older history may be incomplete.

Device history is fetched only when you open a tab. Fleet heartbeat history uses retained snapshots. No new raw heartbeat storage is added by this page.