Custom notification soundsSounds

Set sound and the recipient hears that sound. Give a sale and an outage different sounds and you'll know which happened from across the room. Most people set one per sender.

A sound the team doesn't have is refused at send time, so a typo fails in your code instead of arriving silently.

Upload your own on the dashboard and play them back there. Files must be AIFF, WAV or CAF, under 512KB and under 30 seconds. Those limits are Apple's, and a file that breaks them plays no sound at all.

Uploading under an existing name replaces it, and every device fetches the new file.