Why does my alarm beat silent?

Ringer, message alerts, video playback, and alarms do not rise and fall together. A smartphone remembers a separate level for each kind of sound. What the side buttons change also depends on what is playing: media while music plays, and often ringer or alerts when nothing is playing. The silent switch or Do Not Disturb mainly quiets the ringer and alerts. Clock-app alarms are often left outside that filter, because the sound that must wake you is treated as more important than a short stretch of quiet.

On iPhone, the built-in Clock alarm is said to ring even when the silent switch is down and even when Do Not Disturb or Focus is on. Focus mostly filters app notifications and keeps a separate path for Clock alarms. Android is similar: Do Not Disturb usually has an allow-alarms option, and modes like Alarms only keep the alarm while muting the rest. A Total silence style mode can mute alarms too. Names differ by device, so checking that alarms are allowed in the exceptions list is the safer habit.

A common mix-up is thinking silent means every sound is off. What usually turns off is the ringer and alerts; alarms, timers, and some reminders can still get through. If an alarm sounds too soft, the cause is often a near-zero ringer or alerts slider, not silent mode itself—and the side buttons may be raising only media volume. Third-party alarm apps can also be blocked by Do Not Disturb or Focus unlike the built-in Clock. And if the phone is powered off or fully drained, no alarm will sound.