How to Turn On Dark Mode on iPhone Permanently

Dark Mode swaps the iPhone’s bright white screens for deep greys and blacks. It is easier on your eyes at night, it looks calm and modern, and on iPhones with OLED screens it can genuinely save battery, because black pixels are switched off completely.

Many people switch it on in the evening and off in the morning. But if you prefer the dark look around the clock, iOS lets you lock it on permanently so it never flips back to bright white at sunrise.

This guide shows both ways to enable Dark Mode, how to set it permanently, and how to handle the few apps that have their own separate theme settings.

Quick Answer

To turn on Dark Mode permanently, go to Settings, Display and Brightness, select Dark, and make sure the Automatic toggle below it is OFF. That locks the phone into Dark Mode day and night. You can also switch it quickly from Control Center by long-pressing the brightness slider and tapping Dark Mode, but only the Settings option makes it permanent.

Turn On Dark Mode in Settings (The Permanent Way)

This is the method that sticks. Once set this way, Dark Mode stays on through restarts, updates and long sunny days.

1. Open Settings and tap Display and Brightness.
2. At the top, under Appearance, tap Dark. The whole interface switches instantly.
3. Below, find the Automatic toggle and switch it OFF if it is on.
4. Done. Your iPhone will now stay dark permanently until you change it.

If Automatic is left on, the phone follows a schedule or the sunset, and your ‘permanent’ dark mode will quietly switch itself back to light in the morning. That toggle is the single most common reason people think Dark Mode will not stay on.

Turn On Dark Mode From Control Center

For a quick switch without opening Settings, Control Center has a hidden Dark Mode button inside the brightness control.

1. Swipe down from the top of the screen to open Control Center.
2. Press and hold the brightness (sun) slider until it expands.
3. Tap the Dark Mode icon at the bottom left of the expanded panel.
4. Tap it again any time to switch back to Light.

Note that changing it here does not change the Automatic setting. If a schedule is active, iOS will still override your manual choice at the scheduled time. Use Settings when you want the change to be permanent.

Which Apps Follow Dark Mode and Which Do Not

Dark Mode is a system appearance, and most modern apps obey it automatically. A few categories behave differently:

• Apple’s own apps (Messages, Mail, Safari, Photos, Settings) all follow the system setting.
• Most popular third-party apps follow it too, or offer ‘Use system setting’ in their own theme options.
• Some apps, especially older ones, social media apps and some games, have their own dark theme toggle buried in their settings, separate from iOS.
• Websites choose their own colours in Safari, though many respect the system preference, and Safari’s Reader view always offers a dark background option.

If one app stays glaringly white, look inside that app’s settings for Appearance or Theme before assuming Dark Mode is broken.

Does Dark Mode Really Save Battery?

On iPhones with OLED screens, which includes the iPhone X and every later flagship up to the iPhone 18 Pro models, black pixels are physically off and use no power. Real-world tests consistently show meaningful savings when screens show lots of true black.

• The saving is biggest in apps with pure black backgrounds, like the system apps in Dark Mode.
• On LCD models (iPhone XR, 11 and SE models) the backlight stays on, so savings are minimal, though eye comfort remains.
• Dark Mode at lower brightness is the most comfortable and efficient combination for night use.
• It also reduces screen glare for partners and children sleeping nearby, a benefit nobody measures but everybody appreciates.

Dark Mode and Your Sleep Routine

Many people adopt permanent Dark Mode for the evening benefits and then discover a pleasant side effect: the phone feels less stimulating overall. A bright white screen signals ‘daytime, be alert’ to a tired brain in a way a dark interface simply does not, and anything that makes the last hour before bed calmer is worth having.

To get the full benefit, combine permanent Dark Mode with two allies. Night Shift (in the same Display and Brightness settings) warms colours towards amber on a schedule, and the Sleep Focus can dim the lock screen and hide notifications overnight. Together they create a phone that visibly winds down as you do.

One honest caution: Dark Mode alone does not fix late-night scrolling. The content is the stimulating part, and it stays just as engaging against a black background. Treat dark interfaces as comfort for your eyes and a nudge for your habits, not as a sleep cure, and set the Sleep Focus schedule to do the heavy lifting of actually putting the phone down.

Finally, remember that permanent Dark Mode carries across restarts and iOS updates, so once you have set it you can genuinely forget it exists. The only thing that commonly undoes it is restoring the phone or setting it up from another device’s backup with different preferences, so after any big restore, take ten seconds to confirm your appearance choice survived the journey.

Common Mistakes and Helpful Tips

• If Dark Mode keeps switching off every morning, Automatic scheduling is on. That is a feature, not a bug; turn it off in Display and Brightness.
• Pair permanent Dark Mode with Night Shift (same settings page) if evening eye strain is your main reason; it warms the colours as well.
• Some people find pure dark screens harder to read in bright sunlight. If that is you, a sunset schedule may suit you better than permanent dark; our guide on scheduling Dark Mode for night time covers that setup.
• Dark app icons on the Home Screen are a separate iOS option. Long-press the Home Screen, tap Edit, then Customise to darken icons to match.

Apple covers Dark Mode in its iPhone user guide, including which settings interact with it. See the official Apple page on using Dark Mode for the current wording.

Conclusion

Permanent Dark Mode is one toggle away: Settings, Display and Brightness, choose Dark, and switch Automatic off so nothing overrides you. The Control Center shortcut is handy for quick flips but follows the schedule if one is set. Most apps will obey the system, OLED models gain real battery savings, and your eyes gain a calmer screen at every hour of the day.

Frequently Asked Questions

Why does Dark Mode turn itself off every morning?

Because the Automatic option is enabled with a Light Until Sunset or custom schedule. iOS is doing exactly what it was told. Go to Settings, Display and Brightness and turn Automatic off to keep Dark Mode on permanently.

Is Dark Mode better for my eyes?

It reduces overall brightness and glare, which most people find more comfortable in dim rooms and at night. In bright daylight, dark text on a light background can actually be easier to read. Comfort is personal; the eye-strain benefit is mainly about lower total light, not the colours themselves.

Does Dark Mode affect photos and videos?

No. Photos and videos display in their true colours regardless of the interface theme. Only menus, backgrounds and app chrome change. Editing apps may keep their own neutral interface so your judgement of colours stays accurate.

Can I set Dark Mode for some apps only?

Not from iOS settings; the appearance applies system-wide. However, many apps have their own theme setting that can override the system, so you can set a specific app to stay light or dark while the phone does the opposite.

Why is my keyboard or a pop-up still light in Dark Mode?

A few system elements and third-party keyboards keep their own styling. Third-party keyboard apps often need their own dark theme enabled inside their app settings. Apple’s built-in keyboard follows Dark Mode automatically.