Open the app and enable notifications (disable the battery optimization if prompted).
Subscribe to topic: alphapings (all lowercase)
Tap on "Use another server" and input: https://ntfy.pokemmotools.org
You will get a notification from the Browser or the ntfy App when an Alpha is reported by a trusted player. Check your notification/battery saving settings if you don't receive it. Check dontkillmyapp.com if your Android is killing the ntfy app.
To send notifications as a trusted player, apply here to get your credentials. You don't need credentials to receive the notifications.
If you're not sure what this is, you most likely don't need it. Trusted players can configure the URL endpoint and credentials to send notifications via ntfy. These settings are saved locally in your browser and will be cleared if you delete your cookies.
To send notifications as a trusted player, apply here to get your credentials. You don't need credentials to receive the notifications.