Funny, but it didnt wake me up.

I set the alarm, made sure my volume was all the way up, and do not disturb was set to turn off 15 minutes before alarm time, and made sure the app was running, and locked my screen.

I woke up an hour late, to the sound of someone starting their vehicle outside.

Nice idea, but it doesnt actually seem to work.

Jaera about CARROT Alarm - Talking Alarm Clock, v2.1