How can I set a timer on my phone to go off every hour on the half hour?

Use the Reminders app- set up the reminder you want, then select the info button and toggle on "Remind me at a time". Select the nearest half hour, then press Repeat > Hourly. It should go off every hour on the half hour.

Hope that helped!

Good answer!

Another option is to open the Timer app at the time of one reminder time and start a 1 hour timer. When it alarms, just tap the “repeat” button.

Good Answers!

One other way you can do this is under the alarms tab in the Clock app. From there set up an alarm on every half hour and below the time select, there is a repeat option. From there you can choose how often to repeat it. Although you will have to make around 24 or so alarms for every 12 hours, you can set it once and then forget about it and it will go off every time on the half hour.

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