Flash notifications use your iPhone's camera light to alert you instead of sound
Flash notifications make your iPhone's camera flash blink when you get a call, text, or app alert. Instead of hearing a sound or feeling a vibration, you see a visible light pulse. This is useful if you're in a loud environment, need silent alerts, or have hearing loss and prefer visual cues.
The feature is built into iOS and takes about 30 seconds to turn on. You'll find it in Settings under Accessibility, because Apple groups it with other sensory accommodation features rather than with regular notifications.
Key Takeaways
- Flash notifications are turned on through Settings > Accessibility > Audio/Visual, not through the Notifications settings menu.
- Once enabled, the flash will blink for incoming calls, text messages, and app notifications — you control which types separately.
- Flash notifications work even when your phone is locked or face-down on a table, as long as the screen is off.
- The feature drains battery slightly faster because the camera light activates repeatedly, so consider turning it off if you notice a difference.
The exact steps to enable flash notifications
Open the Settings app on your home screen. Tap Accessibility — it's usually near the bottom of the main settings list, below Privacy.
Scroll down and tap Audio/Visual. You'll see a toggle switch labeled LED Flash for Alerts. Tap the toggle to turn it on. The switch will turn green when it's active.
That's the complete setup. Your camera light will now flash when alerts arrive. You don't need to restart your phone or change any other settings.
Controlling which notifications trigger the flash
Once LED Flash for Alerts is on, the flash responds to all incoming notifications by default. If you want to limit it to only certain types — say, calls and texts but not app notifications — you'll need to adjust individual app settings.
Go to Settings > Notifications and tap each app you want to control. Under Sounds and Haptics, you can turn off sound and vibration for that app while leaving the flash active. This way, only the notifications you care most about will trigger the light.
Alternatively, if you want the flash for everything but want to silence specific apps, turn off notifications entirely for those apps in the Notifications settings, and the flash won't trigger for them either.
When flash notifications work and when they don't
The flash will activate when your phone is locked, when the screen is off, or even when it's face-down on a table. You don't have to be looking at your phone to see it — the light is bright enough to catch your attention in most rooms.
The flash will not activate if your phone is in Do Not Disturb mode, because that setting silences all alerts including visual ones. If you turn on Do Not Disturb, the flash stops working until you turn it off again.
The feature also won't work if your iPhone's camera is physically blocked — for example, if you're using a case that covers the back camera light. Most cases leave the flash area open, but some thicker protective cases might obstruct it.
Battery impact and when to turn it off
Using the camera flash repeatedly does use more battery than silent or vibration alerts alone, though the difference is usually small unless you receive dozens of notifications per hour. If you notice your battery draining faster after enabling flash notifications, you can turn the feature off by going back to Settings > Accessibility > Audio/Visual and toggling LED Flash for Alerts off.
Some people turn flash notifications on only during specific times — for example, during work hours when they need to notice alerts without sound, then turn it off in the evening. There's no penalty for toggling it on and off as needed.
Combining flash notifications with other alert methods
Flash notifications work alongside sound and vibration, not instead of them. If you have both sound and flash enabled, you'll get both when an alert arrives. If you want flash as your only alert method, you need to turn off sound and vibration separately in each app's notification settings.
You can also use flash notifications with Focus modes. For example, you could set up a Work focus that silences sound and vibration but keeps the flash on, so you notice important calls without disturbing others. Go to Settings > Focus, create or edit a focus, and customize notifications for each app within that focus.
Troubleshooting flash notifications that aren't working
If you've turned on LED Flash for Alerts but the light isn't flashing, first check whether Do Not Disturb is active — swipe down from the top-right corner of your screen to see the Control Center. If the moon icon is highlighted, tap it to turn off Do Not Disturb.
Next, verify that the app sending the notification actually has notifications turned on. Go to Settings > Notifications, find the app, and make sure Allow Notifications is toggled on. Some apps are silenced by default.
If the flash still doesn't work, restart your phone by holding down the power button and volume button together, then sliding to power off. Wait 10 seconds and turn it back on. This often fixes notification features that have stopped responding.
Frequently Asked Questions
Does flash notifications work for all types of alerts?
Flash notifications work for calls, texts, and any app that sends notifications through iOS. However, some apps that send their own custom alerts (rather than using iOS notifications) may not trigger the flash. Most major apps like Messages, Mail, and third-party messaging apps do work.
Can I make the flash brighter or change how fast it blinks?
No. iOS doesn't offer controls to adjust the brightness or speed of the flash. The flash uses your camera's standard LED light at its normal intensity and blink rate. If the flash isn't visible enough in bright sunlight, you may need to rely on vibration alerts in those situations.
Will the flash drain my battery significantly?
The battery impact is minimal for most users. The flash uses power only when an alert arrives, and each flash lasts less than a second. If you receive hundreds of notifications daily, you might notice a small difference, but for typical use, the drain is negligible.
Can I use flash notifications while my phone is charging?
Yes. Flash notifications work whether your phone is plugged in or running on battery. There's no restriction based on charging status.
What if my iPhone doesn't have a camera flash?
All current iPhone models have a camera flash. If you have an older iPhone and the LED Flash for Alerts option doesn't appear in Accessibility settings, your model may not support this feature. iPhones from iPhone 5s onward support flash notifications.