It's non-subscription-- you choose when to refill it unless you want to. And there isn't an app. Here is some more information on anti-histamines and sleep: ht

It's non-subscription-- you choose when to refill it unless you want to. And there isn't an app. Here is some more information on anti-histamines and sleep: https://www.bcm.edu/news/sleep-disorders/experts-warn-against-antihistmaines-sleep-aid https://www.bcm.edu/news/sleep-disorders/experts-warn-agains...