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Will My Alarm Go Off in Sleep Mode

In our fast-paced world, where technology seamlessly integrates into every facet of our lives, the question of whether our alarms will faithfully rouse us from slumber while our devices are in “sleep mode” is a modern-day riddle. Imagine this: it’s early morning, and you’re reliant on your trusty smartphone or laptop to wake you up, but the device is peacefully dozing in sleep mode. Will that alarm pierce through the digital dreamscape and ensure you start your day on time? Join us on a journey to unveil the mysteries of alarms and sleep mode, and rest assured, you’ll never hit snooze on this question again.

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Alarm on iPhone

Configuring alarms is a fundamental function on our devices, but modern smartphones, including iPhones, have different behaviors when it comes to alarms in various modes.

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Alarm When iPhone Is Off

No, if your iPhone is powered off, the alarm won’t ring. iPhones conserve battery power when powered down, making it unsuitable for this purpose.

Alarm When iPhone’s Battery Is Dead

Similarly, if your iPhone’s battery is completely drained, the alarm won’t function, as there’s no power source to support it.

Alarm When iPhone Is Silent or on Do Not Disturb (DND)

Yes, your alarm will ring when your iPhone is on silent or in DND mode, as long as the device is powered on. You’ll hear the alarm tone you’ve set, despite the silence settings.

Alarm When iPhone’s Screen Is Off

Yes, if your iPhone is in sleep mode with the screen off, the alarm will still ring as long as the device is powered on, following your scheduled time.

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Will Alarm Go off in Sleep Mode in iOS 16 & Android 13

Back in the day, old Nokia and other basic phones had a nifty feature: the alarm would ring even when the phone was powered off. This ensured a peaceful night’s sleep without worrying about missing your alarm. Surprisingly, this feature still exists on certain Android phones. However, iPhones and iPads, by extension, do not share this capability. But what about sleep mode? Let’s explore that next.

iOS 16

Unlike earlier feature phones, an iPhone’s alarm won’t activate if the device runs out of battery or is powered off. However, if your iPhone is in mute or Do Not Disturb mode, the alarm will still function. Turning off your iPhone also means the alarm won’t work; it must remain powered on for the alarm to ring. Interestingly, the alarm will function as expected even if your iPhone is in sleep mode (with the screen off), set to silent, or set to Do Not Disturb.

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Keep in mind that if your iPhone’s battery dies overnight, your morning alarm won’t go off. iPhones generally conserve power well when in Low Power Mode, but with only about 20% battery remaining, it’s still safe. However, if you have a mere 5% battery left and plan to sleep for eight hours, there’s a high chance it will run out of power during the night.

These same rules also apply to timers, calendar events, and reminders. If you set a timer and turn your iPhone off, it won’t alert you until the device is powered on again, serving as a reminder of the missed timer.

Android 13

Notably, Android devices offer a convenient feature that keeps your alarm active even when in Silent or Do Not Disturb mode. This feature, known as “Bedtime” mode (formerly “Wind Down”), not only silences calls, messages, and notifications but also gradually transitions your phone’s display to grayscale, reducing eye strain. Google has streamlined the control of Bedtime mode to enhance user experience.

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You can now set Bedtime mode to activate automatically when you plug your phone into its charger, aligning it with your sleep routine. For quick access, you can also add Bedtime mode to your Android phone’s Quick Settings, allowing you to toggle it on or off with a single tap. Additionally, you have the option to temporarily pause Bedtime mode if you need a few extra minutes without altering your schedule.

It’s worth noting that even if you don’t utilize Android’s Bedtime mode, your phone’s alarm will still function as scheduled when your device is in Silent or Do Not Disturb mode.


In the ever-evolving landscape of digital devices, understanding how alarms function in various modes is essential to ensure a timely start to your day. While older feature phones had the ability to wake us up even when powered off, modern smartphones, including iPhones, have their own set of rules.

Remember, your iPhone’s alarm will only ring when the device is powered on, regardless of whether it’s in Silent, Do Not Disturb, or sleep mode. However, Android users can benefit from the “Bedtime” mode that ensures alarms are always heard, even in hushed conditions. In the world of technology, it’s these small details that make a big difference in our daily lives. So, next time you set your alarm, you’ll know exactly what to expect from your trusty device.

Have you ever had an alarm mishap on your smartphone? Share your experiences and insights in the comments below. How do you manage alarms on your device, and have you found any unique tricks to ensure you always wake up on time? Your feedback and reviews help us keep you informed and empowered in the digital age.

Frequently Asked Questions

Does sleep mode turn off alarms?

No, sleep mode does not turn off alarms. Your alarm will still go off as scheduled even when your device is in sleep mode.

Will my iPhone alarm go off in sleep mode?

Yes, if your iPhone is in sleep mode with the screen off, your alarm will still ring. As long as the iPhone is powered up, the alarm will sound based on its schedule.

Why can’t I hear my alarm when I’m sleeping?

If you can’t hear your alarm while sleeping, it could be because you’re a heavy sleeper. Some individuals naturally sleep deeply, and this can make it harder to wake up to alarms.

Will alarms go off in silent mode?

Yes, alarms will still go off in silent mode. Silent mode does not mute alarms; it only affects other notifications. Your alarm will ring unless you switch off the phone or the battery is depleted.

Is sleep mode a security risk?

Sleep mode can pose a security risk as it leaves the computer vulnerable to direct memory access attacks. To enhance security, it’s advisable to disable sleep mode and use TPM+PIN for authentication.

What does sleep mode do?

Sleep mode is a power-saving state that suspends all computer activities, conserving power. It stores open documents and apps in RAM while reducing power consumption.

What happens when the iPhone is in sleep mode?

Sleep mode on an iPhone dims the screen, lock screen, and prevents notifications on the lock screen. You can also add shortcuts to specific apps on the lock screen when Sleep Mode is active.

Why didn’t my alarm go off?

An alarm might not go off due to software issues. Restart your phone or perform a factory reset as a last resort. If the problem persists, contact your device manufacturer or carrier.

Why do I never wake up to my alarms?

Failure to wake up to alarms may be due to insufficient sleep, circadian rhythm misalignment, or underlying medical conditions or sleep disorders.

How do I silence my phone but keep the alarm?

To silence your phone but keep the alarm, swipe down from the top of your screen with two fingers, enable Do Not Disturb, and select “Alarms only” as the option.

How do I silence my iPhone but keep the alarm on?

Do Not Disturb and the Ring/Silent switch do not affect the alarm sound. If set to Silent or in Do Not Disturb mode, the alarm will still sound as expected.

What is the difference between sleep mode and night mode?

Sleep mode typically refers to a power-saving state on devices, while night mode can refer to various settings designed to improve nighttime screen visibility, such as reducing blue light emissions.

Why does my alarm not go off sometimes on my iPhone?

If your iPhone alarm sometimes fails to go off, it could be due to software glitches. Try restarting your iPhone to resolve temporary issues and ensure the alarm works as intended.


John Doe

John Doe

I am John, a tech enthusiast with a knack for breaking down complex camera, audio, and video technology. My expertise extends to social media and electronic gadgets, and I thrive on making the latest tech trends understandable and exciting for everyone. Sharing my knowledge through engaging content, I aim to connect with fellow tech lovers and novices alike, bringing the fascinating world of technology to life.

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