Using your phone late at night can strain your eyes and make it harder to fall asleep. Android has several built-in settings that make the screen easier on your eyes after dark: Dark theme, Night Light (called Eye comfort shield on Samsung) and Extra dim. This guide explains what each one does and how to set them to turn on automatically.
Key takeaways
- Dark theme turns white backgrounds black and can save battery on OLED screens.
- Night Light tints the screen amber to reduce blue light in the evening.
- Extra dim lowers brightness below the normal minimum.
- Schedule them from sunset to sunrise so you never have to remember.
What this guide covers
Dark theme
Dark theme changes the system and supported apps to light text on a dark background. Turn it on from Settings > Display > Dark theme (Samsung: Settings > Display > Dark) or from Quick Settings. Google lists dark theme among its battery-saving tips, because on OLED screens black pixels use less power.
Most popular apps, including Google apps, WhatsApp and YouTube, follow the system theme automatically. Some apps have their own theme setting.
Night Light / Eye comfort shield
Night Light gives the screen a warm amber tint, which reduces blue light. Many people find it more comfortable for reading in dim rooms. Find it in Settings > Display > Night Light; on Samsung it is Eye comfort shield. Use the intensity slider to choose how warm the screen looks.
Extra dim
Even at the lowest brightness, some screens are too bright in a dark bedroom. Extra dim reduces brightness further. Look for it in Quick Settings or under Settings > Accessibility > Extra dim on recent Android versions. Samsung phones offer a similar option called Extra dim in Quick Settings or Accessibility.
Set a schedule
| Feature | Recommended schedule |
|---|---|
| Dark theme | Sunset to sunrise, or always on |
| Night Light / Eye comfort | Sunset to sunrise |
| Bedtime mode (Digital Wellbeing) | Your sleep hours |
- Open the feature’s settings page.
- Tap Schedule.
- Choose Turns on from sunset to sunrise or set custom times.
For a calmer evening routine, combine these with Bedtime mode from Digital Wellbeing, which can also silence notifications and switch the screen to grayscale.
Other tips for night-time phone use
- Hold the phone at a comfortable distance, not close to your face.
- Increase text size in Settings > Display > Font size to avoid squinting.
- Take regular breaks: look at something far away for a few seconds every 20 minutes.
- Put the phone away a while before sleeping when you can.
Note: These settings make the screen more comfortable, but they are not a medical treatment. If you have ongoing eye discomfort or sleep problems, speak to a doctor or optometrist.
FAQs
Does dark mode really save battery?
On phones with OLED or AMOLED screens, yes, because dark pixels use less power. On LCD screens the saving is small.
Is Night Light the same as Dark theme?
No. Dark theme changes colours of the interface; Night Light adds a warm tint to the whole screen. You can use both.
Why do screenshots look normal with Night Light on?
Night Light changes how the screen displays colours, not the image itself, so screenshots are not tinted.
Sources: Android Help: Battery tips · Android Help. Menu names can differ slightly between phone brands and Android versions.