You can use Siri to activate named iOS alarms, which is handy if you have multiple alarms. Here’s how to get started.
Named iOS Alarms
You can name iOS alarms in the Clock app, which I covered in a previous tip. To use Siri, just say something like “Hey Siri, turn on the <name> alarm.” The good thing about this is that it’s built into the system, meaning you won’t have to set up a fancy new Siri Shortcut once iOS 12 rolls out.