How do I set an hourly alarm on Apple Watch and iPhone?

I prefer the very flexible iPhone “Alarmed” app, from Yoctoville.

https://apps.apple.com/us/app/alarmed-reminders-timers/id371886784

I use it for about 95% of my alarms, reminders, timers, calendar events, etc... Daily alarms, such as “Lunch Time”, wake up alarms, medication reminders, birthdays, anniversaries, licence renewal, state car inspection reminders, get up extra early because it is trash/recycling day, change HVAC air filters, appointments, time to leave for the airport, etc...

The basic features are free to use, but they are very useful. There is a one-time $5 U.S. in-app purchase to enable additional features (I think it is worth it).

Alarmed sounds on my Apple Watch and lets me dismiss or snooze the event.

You can create your own preset timers, and they can have their own unique alarm sounds. I have 3, 5, 8, 10, 15, 20, 25, 30, 35, 40, 50 minute, 1hr timers already setup. I can add more if needed.

You can have geolocation alarms, so that when you are approaching a given location, you can get an alarm to pickup milk.

Part of the in-app purchase are additional unique sounds, Nag-Me, and DayMinder.

Nag-Me allows you to repeat the alarm every few minutes (settable) until you dismiss it. Great for things you have to do, but might be busy right at the moment the alarm first triggers. This alone was well worth the in-app purchase.

DayMinder allows you to issue an alarm multiple times a day, for example ever hour, or 2, such as a stand up and walk around.

You can clone an alarm and edit it.

You can revive a dismissed alarm and edit it.

In the Clock/Alarm app, no. You can create an alarm for each individual hour, then set to repeat daily, which would achieve a similar thing. the alternative is to create a reminder and set the frequency to 'hourly'.

Hope this helps.

Have a look at these steps on how to get chimes on the hour:

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copied from: Tell time on Apple Watch - Apple Support