Android WiFi scanning throttling

Android 8.0 and Android 8.1:

Each background app can scan one time in a 30-minute period.

Android 9:

Each foreground app can scan four times in a 2-minute period. This allows for a burst of scans in a short time.

All background apps combined can scan one time in a 30-minute period.

Android 10 and higher:

The same throttling limits from Android 9 apply. There is a new developer option to toggle the throttling off under Settings > Developer Options > Networking > Wi-Fi scan throttling.

Android References:

• Android Wi-Fi scanning overview documentation
• Configure on-device developer options

Other References:

• Android Pie introduced Wi-Fi scan throttling
• Android started heavily throttling Wi-Fi scanning in 9