iPhone alarm not going off or silent? 10 fixes that work

Few phone problems cost as much as an alarm that stays quiet. The cause is almost always a setting, not a broken phone. Here is how to find it tonight, before you rely on the alarm again.

Agha Ali Abbas25 September 20266 min read

When an alarm fails, it usually fails in one of two ways. Either it never went off at all, or it went off with no sound, just a vibration or a volume too quiet to hear. The fixes overlap, but knowing which one happened saves time.

It never went off: look at fixes 1, 2, 3 and 8 first. These are about the alarm itself, the phone being on and the time.
It went off silently or only vibrated: start with fixes 4 to 7. These are about the sound and volume.

Why is my iPhone alarm not going off?

The fix

Work through these 10 fixes

1
Check the alarm is on and set for the right time.
Open the Clock app and tap Alarms. The switch next to the alarm must be green. Check AM and PM carefully. 7:00 PM instead of 7:00 AM is one of the most common reasons an alarm “fails”. If it should ring every day, tap the alarm and look at Repeat. Never means it rings once and then switches itself off.
2
Keep the iPhone on and charged overnight.
An iPhone cannot sound an alarm when it is powered off or the battery is dead. If the phone died overnight, the alarm never had a chance. Charge it at night, and check the cable is actually charging. See our guide to an iPhone that will not charge if it keeps stopping.
3
Delete the alarm and create a new one.
A single alarm can get stuck, especially one created years ago or restored from a backup. Swipe left on it, tap Delete, then tap the plus button to add a fresh one. If you have dozens of old alarms, delete the ones you no longer use so the right one is easy to find.
4
Make sure the alarm has a sound.
In the Clock app, tap Edit, tap the alarm, then tap Sound. If it says None, the alarm only vibrates. Choose a built-in ringtone. If you picked a song, switch to a built-in tone for a night to test. A song that is no longer downloaded or no longer in your library can leave the alarm quiet.
5
Turn up the alarm volume.
On iOS 26 and earlier, alarms use the ringtone volume. Go to Settings › Sounds & Haptics and drag the Ringtone and Alerts slider up. If Change with Buttons is off, the side buttons only change media volume, so a loud video does not mean a loud alarm. On iOS 27, see the next section for the new separate alarm volume.
6
Turn off Attention Aware Features.
On iPhones with Face ID, this feature lowers the volume of alarms and alerts when it sees you looking at the screen. If you check your phone just as the alarm goes off, it can drop to a whisper. Go to Settings › Face ID & Attention and turn off Attention Aware Features.
7
Check where the sound is going.
Apple says alarms play through the iPhone speaker and through connected headphones at the same time. If you fall asleep with AirPods in, the alarm should still sound from the phone. Test it: set an alarm for two minutes from now with your headphones connected and make sure you hear the speaker too.
8
Check the date, time and time zone.
Go to Settings › General › Date & Time and turn on Set Automatically. If the time zone is wrong after travel, alarms ring at the wrong hour. Our guide on updating the time zone when you travel explains how.
9
Restart and update your iPhone.
Many “iPhone alarm not going off after update” reports clear up with a restart. Then install any update in Settings › General › Software Update, since Apple often fixes Clock bugs in small updates.
10
Test the speaker, then reset settings as a last resort.
Play music with no headphones connected. If you hear nothing or it crackles, the speaker is the problem, not the alarm. If music plays normally, go to Settings › General › Transfer or Reset iPhone › Reset › Reset All Settings. This resets settings like Wi-Fi and wallpaper but does not delete your photos, apps or messages. You will need to set your alarms again.

New in iOS 27: a separate alarm volume

For years, the only way to make an iPhone alarm louder was to raise your ringtone volume too. iOS 27, released in September 2026, finally separates them. If your alarm is too quiet on iOS 27, this is the setting to check:

1
Open Settings and tap Sounds & Haptics.
2
Find Alarms and Timers.
Turn off Match Ringtone Volume. A separate slider appears.
3
Drag the alarm slider up.
Now you can keep calls and texts quiet while your alarm stays loud. The catch: if this slider is low, your alarm will be quiet even with the ringtone at full volume. After updating to iOS 27, check it once.

Not sure which version you have? Look in Settings › General › About. If this option is missing, you are on iOS 26 or earlier, and the Ringtone and Alerts slider controls your alarms.

Using a Sleep schedule? That alarm has its own settings

The Wake Up alarm from a Sleep schedule is different from a normal alarm. It shows at the top of the Clock app under Sleep | Wake Up and has its own sound and its own volume slider, separate from everything above.

In the Clock app, tap Change next to Sleep | Wake Up. Make sure the Wake Up Alarm switch is on.
Under Alarm Options, check the Sounds & Haptics choice and drag the volume slider up. People often set this once, very low, and forget about it.
A schedule can be set for weekdays only. If the alarm did not ring on a Saturday, check which days the schedule covers in the Health app under Sleep › Full Schedule & Options.
If you changed or turned off the alarm for the next wake-up only, the change applies to that one morning and the schedule goes back to normal after it.

Alarm vibrates but no sound in StandBy?

StandBy is the clock-style screen that appears when your iPhone is charging on its side. Apple notes that haptics are turned off for alarms in StandBy, so the alarm relies on sound alone. If the sound is set to None or the volume is low, a StandBy alarm can pass in near silence. Make sure the alarm has a real tone, as in fix 4.

How to make sure your alarm works tomorrow

Do this quick test before bed, especially after an update or a new phone:

Set a test alarm for two minutes from now with the same sound as your morning alarm.
Put the phone face down and leave the room, so Attention Aware cannot lower the volume.
Listen for it from where you sleep. If it is too quiet, raise the volume or pick a louder tone.
Delete the test alarm and confirm your real alarm is on, with the right AM or PM.
Plug in the charger and check the battery icon shows it charging.

Some tones are much louder than others. Short, sharp tones cut through sleep better than soft ones. If you need a tougher sound, here is how to change your alarm sound. And if you tend to hit snooze too often, you can shorten the snooze time on iOS 26 and later.

Frequently asked questions

Does Silent mode stop my iPhone alarm?

No. Apple confirms that Silent mode, the Ring/Silent switch and Do Not Disturb do not affect alarms from the Clock app. If your alarm was silent, the cause is the alarm sound, the volume or another setting.

Why does my iPhone alarm only vibrate?

The alarm's sound is set to None, or the alarm volume is at zero. Open the Clock app, tap Edit, tap the alarm, tap Sound and pick a ringtone, then raise the alarm volume in Settings › Sounds & Haptics.

Will my alarm go off if my iPhone is turned off?

No. An iPhone that is powered off or has a dead battery cannot sound an alarm. Keep it charged overnight and never switch it off when you need to wake up.

Why did my alarm go off quietly and then get louder?

If your alarm is the Wake Up alarm from a Sleep schedule, or you were looking at the phone with Attention Aware Features on, the volume can start low. Check the Sleep schedule volume slider and Face ID & Attention settings.

What to try next

iPhone

iOS 27 indexing in progress

Seeing Indexing in Progress on iOS 27, or stuck on Optimizing Search and Siri? Learn what it means, how long it takes and how to help it finish faster.

26 September 20268 min read

Show me the fix