The built-in Clock app on iPhone can't set an alarm for a specific date. If you've ever thought “I only need to wake early on that one day” or “just remind me on that date,” here's how the built-in Alarm, built-in Reminders, and CAlarm compare.
Download on theApp StoreThe iPhone Clock app can set a time or repeat by weekday, but it can't target a specific date like “only on 15 Apr.” You can use the built-in Reminders for a similar purpose, but reminders arrive as notifications — they stay silent in silent mode and lack the full-screen, hard-to-miss display of an alarm.
“○” means yes/available, “×” means no/unavailable, and “—” marks items not compared in this article.
| Item | iOS built-in Alarm | iOS built-in Reminders | CAlarm |
|---|---|---|---|
| Ring on a specific date | No (time only) | Yes | Yes |
| Repeat by weekday | Yes | — | Yes |
| Rings on silent mode | Rings | Doesn't ring (notification) | Rings (AlarmKit) |
| Pre-alert (heads-up before) | None | — | Yes (9 steps, 5 min–1 week before) |
| Full-screen on the Lock Screen | — | None | Yes |
| Flexible snooze | — | — | None up to 12 hours |
| Templates & schedule linking | — | — | Yes |
The built-in iPhone alarm only sets a time and can't target a specific date. The built-in Reminders app can set a date and time, but it's delivered as a notification. CAlarm lets you set both a date and a time, and is built to ring on that exact day.
The built-in alarm supports repeating on selected weekdays. CAlarm also lets you set recurring alarms with any combination of Mon–Sun, so it works for daily routines too.
The built-in alarm rings at the ringer and alarm volume, so it sounds even on silent. The built-in Reminders arrive as notifications, so they stay silent in silent mode. CAlarm uses Apple's AlarmKit (iOS 26) and rings at alarm volume even on silent.
The built-in alarm has no pre-alert to warn you before the event. CAlarm offers 9 pre-alert steps from 5 minutes to 1 week before, so you don't lose time to prepare or travel.
The built-in Reminders are a type of notification, so there's no full-screen Lock Screen display. CAlarm shows alarms and reminders full-screen on the Lock Screen, so you won't miss them.
CAlarm lets you pick snooze intervals from none up to 12 hours — from short anti-oversleep gaps to a later second reminder.
CAlarm can save recurring schedule patterns as templates and apply them to a chosen day in one tap. You can also link several alarms to a single schedule.
Requires iOS 26.0 or later · Free (with in-app purchases)
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