This app is terrible and so is the support
The noises DO NOT stay on with the timer set. I have tried to use this app for over a month and it starts out fine, but the sound does not stay on for the duration of the timer on my iPad Pro. I reached out to the support team three times with NO response. Zero support for this app. My last attempt was to request a full refund as I am unable to use as advertised. Disappointing.