Last 15 minutes
The recall list in Detection history that shows what just alerted, so a tone you did not catch can be checked after the fact.
Alerts stay in the recall for a quarter of an hour after they end. Open it from Menu → Detection history → the Last 15 minutes toolbar item.
The list#
Each row is one alert: band, frequency, peak strength on the detector's scale, direction, when it ended and whether it was muted (and why). Tap a row to open its encounter, where it can be classified or reported. Refresh reloads the list; an alert whose readings have already left the store reads "Alert not in history".
Nothing shows on the map for the recall; the map keeps only live alerts.