How to Fix an iPhone Alarm That Is Silent or Too Quiet

An iPhone alarm that is silent, too quiet, or only vibrates usually has a low Ringtone and Alerts volume, a disabled sound tone, or an incorrect alarm setting. Increase alert volume, select a built-in alarm sound, verify the alarm schedule, and restart the iPhone if the problem continues.

Steps

Open Settings > Sounds & Haptics and move the Ringtone and Alerts slider to a higher level. Turn on Change with Buttons only if physical volume buttons should control alarm volume.
Open Clock > Alarms, tap the affected alarm, and confirm Sound is not set to None. Select a built-in tone and save the alarm.
Check the alarm time, repeat schedule, and AM/PM setting. Confirm the alarm switch appears enabled.
Restart the iPhone, then create a test alarm for two minutes later. Test both sound and vibration.
Update iOS through Settings > General > Software Update if the alarm remains silent or unreliable.

Common Issues and Fixes

iPhone alarm only vibrates: The alarm sound may be set to None. Select a ringtone under the alarm’s Sound setting.
iPhone alarm too quiet: Ringtone and Alerts volume may be low. Increase the slider under Settings > Sounds & Haptics.
iPhone alarm not going off with sound: The alarm may be disabled, scheduled for the wrong day, or set to an incorrect time. Review the alarm schedule and repeat options.
Alarm volume changes unexpectedly: Physical volume buttons may be changing alert volume when Change with Buttons is enabled. Disable the setting and set a stable alert volume.
Alarm remains unreliable after correct settings: A temporary iOS issue may be affecting Clock. Restart the iPhone and install available software updates.

Quick Tips

🤔Note:

Silent mode and Do Not Disturb generally do not silence standard Clock alarms, but a selected None sound will produce vibration only.

💡Protip:

Music, videos, and phone-call volume do not control alarm loudness. Ringtone and Alerts volume controls standard alarm volume.

Bluetooth headphones normally do not receive the alarm exclusively. The iPhone speaker should still play the alarm.
Avoid covering the speaker with a case, debris, or bedding during testing.
Sleep Schedule alarms and regular Clock alarms use separate settings. Check both when a wake-up alarm fails.