For Post Nights, published by Post Nights LLC. Write to support@postnights.com — and if it is about a wake-up, say which phone you have.
In the app, go to You › Test your wake-up. It sets a real wake-up two minutes away, the same kind your plan sets, and asks afterwards whether it rang. It is the only way to know your phone lets it through.
On iPhone, the wake-up is a system alarm on iOS 26 and later. Make sure Post Nights is allowed to set alarms: the app asks the first time, and you can change it in your iPhone’s Settings.
On Android, some phones stop apps in the background to save battery, and that can stop a wake-up. The menus differ between phones and between versions; these are the usual places:
Then test again.
It is not a medical device, and it does not assess whether you are fit to work. If your sleep is affecting your health, that is worth raising with a doctor.
Post Nights LLC
5900 Balcones Dr, Ste 5374, Austin, TX 78731
United States
+1 (512) 955-2518