Apple's Clock app on iOS offers several ways to set alarms to go off on your iPhone at specific times. You can set a Sleep/Wake alarm to match your sleep schedule on certain days, or set other alarms that are personalized for different times of day.

If you want to set or change the alarms on your iPhone, you can read the following post.

In addition to being a focus routine that prepares you for sleep, the sleep schedule also sets an alarm in the clock app when you wake up. If you have an existing sleep schedule on your iPhone, you can modify it by following the steps below.

The sleep alarm in the Clock app will now show the changes you've made.