As everyone else said, the alarms are AWFUL. I'm fine with them waking me up at night, since that's kind of the whole point, but I would like to change the low alarm sound. It says "custom," but what they really mean is that you can add a custom tone to the already existing, ear piercing alarm so you have two sounds simultaneously. That, I'm not a fan of. It also takes a panic induced bit to get the alarms to turn off. You have to go to the notification itself then scan, instead of opening it.