Grayscale iPhone: How to Turn It On, and Does It Really Work?

Turning your iPhone black and white takes a few taps, and it's one of the few phone tweaks researchers have actually put to the test. Here's how to switch it on, how to bring the color back in a second when you need it, how to make it automatic, and what the studies found it does to your screen time.

How to turn on grayscale on iPhone

The setting lives in Accessibility, as one of the iPhone's color filters ^[1]:

1. Open Settings and tap Accessibility.
2. Tap Display & Text Size, then Color Filters.
3. Turn on Color Filters and choose Grayscale.

The whole screen turns gray at once: icons, photos, videos, everything. The steps are the same on iOS 26 and iOS 27. Apple notes that color filters change the look of images and videos, and that Night Shift, which warms the screen in the evening, switches off the other color filters but leaves grayscale on ^[1].

Switch it on and off with a triple click

Grayscale is easiest to live with when color is one gesture away, for the photo you're editing or the map you need to read. Set it up once ^[2]:

1. Go to Settings, then Accessibility, then Accessibility Shortcut.
2. Select Color Filters.

Now a triple click of the side button (or the Home button, on iPhones that have one) turns grayscale on or off. If Color Filters is the only feature you select, it switches immediately, with no menu ^[2].

There are other ways to reach the same switch. Back Tap, in Settings, Accessibility, Touch, lets a double or triple tap on the back of the iPhone turn on an accessibility feature ^[3], and Apple's guide notes that accessibility features can also be switched from Control Center or with Siri ^[2].

Make grayscale automatic

The Shortcuts app can turn grayscale on for you, at a time of day or when a particular app opens, and an automation can be allowed to run without asking you first ^[4]:

1. In Shortcuts, make a shortcut with one action, Set Color Filters, set to turn color filters on (with Grayscale already chosen in Settings).
2. Give it an automation trigger: a Time of Day, such as 9 p.m., or App, for when your feed apps are opened.
3. Allow it to run without asking, so it doesn't stop to check with you each time.
4. Make a twin that turns color filters off: in the morning, or when those apps are closed.

With the App trigger, your feeds open in gray while your camera, maps and messages stay in color.

Does grayscale reduce screen time? What the studies found

Yes, modestly, in the studies so far:

• In a randomized trial with 112 students who used iPhones, the group that switched to grayscale cut its screen time at once, by about 50 minutes a day, compared with a group that only tracked its use. A third group that set itself time limits in Apple's Screen Time cut back by less, and more gradually. The researchers found no immediate effect of using the phone less on students' well-being or academic performance ^[5].
• In the Netherlands, 84 Android users had their phones tracked through a normal week and then a gray one. Their screen time fell by about 20 minutes a day, from 4 hours 47 minutes to 4 hours 28 minutes, and they reported less stress and more control over their phone use. Their sleep and productivity didn't change ^[6]. With no separate control group, other changes between the two weeks could explain part of it.
• In California, 51 first-year medical students spent one week in grayscale and one in color, in alternating order, and recorded about 28 minutes a day less screen time in the gray week ^[7].

Twenty to fifty minutes a day is real time, about an episode of a show. But look at what didn't change in the Dutch study: people unlocked their phones about 80 times a day in both weeks. The checking habit stayed; the sessions got shorter ^[6].

Grayscale won't stop you picking up your phone. It just makes the screen less worth staring at.

Why color is part of the pull

Phones are designed to catch your eye. Notification badges are a small example: in an online experiment with more than 1,000 people, an app drew far more first clicks when its icon carried a badge than when it didn't ^[9]. Grayscale leaves the badge in place but drains its red, along with every bright thumbnail and saturated photo in your feeds.

That may be why the effect seems strongest where the pictures are. In the Dutch study, time on image-heavy apps such as social media, video and games fell more than time on text and audio apps, though the difference wasn't large enough to be sure of ^[6].

What grayscale can't do

It's easy to undo. The triple click that brings color back for a photo brings it back for the feed too. In a trial where people picked from ten simple phone changes, grayscale was among the hardest to keep: two weeks in, only 38% of participants were still using it ^[8]. In the Dutch study, people rated grayscale more annoying than helpful, and about half said they would rarely or never use it again ^[6].

It doesn't end the scroll. A gray feed still refreshes, still autoplays and still has no last post. Grayscale makes each swipe a little duller; it doesn't decide when you stop.

Some things need color. Photos, maps, charts, a ripe avocado in a grocery app. And Color Filters is an accessibility feature, built to make the screen easier to see, including for people with color vision deficiencies ^[1]. If you rely on color to read your screen, grayscale isn't the tool for you.

How to make grayscale stick

• Make it the default for the hours you lose. An automation that turns grayscale on at 9 p.m. decides for you before the evening scroll starts.
• Gray only the feeds. The App trigger keeps everything else in color, so there's less reason to switch it off.
• Turn off the badges you don't need. In Settings, Notifications, choose an app and turn off Badges.
• Add a limit for the nights gray isn't enough. Unrotten gives the apps you choose a stopping point: with Shorter scroll sessions they take a break once a scroll runs past the length you set, and with Less scrolling, Apple's Screen Time shield locks them once your daily limit is used up, with no "ignore limit" button.

Grayscale takes a reward away from the screen. Unrotten's MindBattery puts a cost on it instead: a score from 0 to 100 on your Lock Screen and in the Dynamic Island that drains while you use the apps you chose and recharges with sleep, movement and time away from them. One makes the feed duller; the other shows you what it's taking.

Grayscale is one of seven research-backed fixes in our guide on how to stop doomscrolling. And if you're deciding between the limits built into your iPhone and an app, we compared Apple Screen Time with screen time apps.

Is grayscale worth a try?

For a free setting that takes a minute to switch on, yes. Expect 20 to 50 minutes a day back, not a new relationship with your phone, and expect to want the color back. Set the triple click, schedule it for the evening, and pair it with something firmer for the nights it isn't enough.