Schedule an alarm to go off after a certain amount of time instead of at a certain hour and minute.

Instead of setting the alarm to go off at 7 a.m., you can set it to go off in 15 minutes.

Add a new alarm with ic alarm plus → NAP button. You can choose naps from 1 minute to 10 hours.

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Figure 1. Switch to naps
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Figure 2. Nap list
Note By default, nap alarms are deleted after they go off, but you can uncheck the Delete after ringing option in Alarm settings.