Normally I use the Old Clock lullaby, but some nights I have real bad tinnitus, and using one of the ‘noise’ like White Noise or Pink Noise helps mask the Tinnitus sound to help me sleep, but those are REALLY LOUD compared to the Old Clock one, so if I use it I have to turn my phone volume down to like 35% so I can sleep or it will keep me up.
Some of the other lullabies like Hair Dryer, Fan, and Shower are really loud as well, others like Whale Diving, Car, Bath, and the ASMR ones seem to be about the same volume as Old Clock.