Does turning your phone grayscale help you use it less?

If you're wondering whether turning your phone grayscale helps you use it less, the research says yes, a little. In short studies of college and medical students, switching to grayscale cut screen time by about 20 to 40 minutes a day over one to two weeks. It did not reliably reduce how often people picked up their phone, and on its own it did nothing measurable for sleep.

Turning it on takes under a minute on an iPhone or Android phone (steps below). Keeping it on is harder, and so is knowing which problems it won't touch. That's most of what this post is about.

The newest trial found 28 fewer minutes a day for medical students

On 6 July 2026, Frontiers in Digital Health published a crossover trial with first-year medical students in California. Of the 61 who enrolled, 51 finished both weeks. Each person spent one week in grayscale and one in color, with the order alternated.

That works out to roughly 8% of a very long phone day. The effect was almost identical whichever week came first (about 28 minutes either way), which makes it less likely to be a quirk of ordering.

The limits are real. Students read their numbers off their phone's own tracker and typed them in, with no screenshot check. Nobody was blinded, it lasted two weeks, and the authors call the results "preliminary and hypothesis-generating". Self-rated productivity and sleep showed no consistent difference between the weeks.

Only 10 people left comments, so treat them as color, not data. Still, the themes are telling: some time simply moved to a bigger screen, maps and travel padded the totals, and apps that rely on color got harder to use.

Earlier grayscale phone studies landed between 20 and 40 minutes too

The 2026 trial fits a pattern. The strongest older number comes from a study that measured screen time objectively, at two lab visits, instead of trusting people's own reports.

• Holte & Ferraro, 2020: the drop came from social media and web browsing. Anxiety and depression improved in both the grayscale and control groups, so grayscale can't take credit for that.
• Holte, Giesen & Ferraro, 2021 (Current Psychology): 133 college students, 63 in grayscale. Problematic phone use, anxiety and screen time all fell, depression didn't. The authors say the anxiety drop "may not be clinically significant".
• Dekker & Baumgartner, 2024 (Mobile Media & Communication): 84 students, with a research app logging use for a normal week and then a grayscale week. Screen time fell about 20 minutes a day and people felt more in control and less stressed. There was no separate control group.
• Wickord & Quaiser-Pohl, 2023 (Computers in Human Behavior Reports): usage fell after at least 24 hours of grayscale, but only 92 of 240 people finished, so it's weak support at best.
• A large unpublished trial (CSU ScholarWorks thesis): 462 students randomly assigned to five groups for three weeks with logged use. The grayscale group picked up their phones less often each week. It hasn't been peer-reviewed.

Every one of these studied students, and none ran longer than a few weeks. A 2026 review of disconnection habits by Dekker, Sumter & Baumgartner describes the research on these strategies in general as offering "only limited support". Grayscale has a better record than most, but the record is short.

Grayscale didn't change checking, video or sleep

You may still pick up the phone just as often

In the Dekker & Baumgartner study, the best-logged of the bunch, minutes fell while daily pickups stayed flat. The authors put it down to "deep-rooted checking habits". The unpublished thesis found the opposite, so the honest summary is mixed evidence leaning toward "grayscale shortens sessions more than it stops them starting".

Video time didn't budge in the lab-measured study

Holte & Ferraro found grayscale "did not appear to influence video screen time". A gray TikTok still has sound, faces and a next clip ready to go. If short video is where your hours go, grayscale is probably the wrong tool.

Sleep only improved when grayscale came with other changes

Neither Dekker & Baumgartner nor the 2026 trial found a sleep benefit from grayscale alone. Sleep did improve in a randomised trial by Olson and colleagues, where grayscale was one of 10 nudges, including turning off non-essential notifications. Nobody can say which nudge did the work.

The dopamine explanation is a guess

You'll often read that grayscale works by starving your brain of dopamine. None of these studies measured dopamine. The researchers' own wording is more modest: a gray phone is less gratifying to use.

Why grayscale makes your phone a bit less addictive, and who it annoys

Apps lean on color to catch your eye: red badges, saturated thumbnails, bright buttons. Grayscale works as a self-nudge. It blocks nothing and forbids nothing, it just makes each scroll a little duller, so you drift off sooner. If you want the longer story on why feeds are so sticky, I covered it in why it's so hard to stop scrolling.

It suits people who lose time to image-heavy browsing and social apps, which is where the studies saw the drop. It frustrates people who rely on maps, photos or color-coded study apps, and it does little for heavy video watchers. Grayscale dims the useful parts of your phone along with the feeds.

How to turn on grayscale on iPhone, Android and Samsung

Menu names shift between software versions. If a path below doesn't match your phone, search Settings for "grayscale" or "color filters".

• iPhone: Settings › Accessibility › Display & Text Size › Color Filters. Turn on Color Filters and choose Grayscale.
• iPhone shortcut: Settings › Accessibility › Accessibility Shortcut › Color Filters. Now a triple-click of the side button switches it on and off.
• Pixel and most Android phones: Settings › Accessibility › Color and motion (or Color correction) › Grayscale. Digital Wellbeing's Bedtime mode also has a grayscale option, though that only covers the night.
• Samsung: Settings › Accessibility › Visibility enhancements › Color correction or Grayscale, depending on your One UI version.

Is grayscale worth it? Run a one-week test and find out

Every study used grayscale all day for one to three weeks. Night-only use hasn't been tested, so the all-day version is the one with evidence behind it.

1. 01
   Get a baseline

   Write down this week's daily average screen time and pickups from Screen Time or Digital Wellbeing.

2. 02
   Go gray all day

   Keep grayscale on from morning to night for seven days straight.

3. 03
   Flip it only for real needs

   Use the shortcut for maps or photos, then switch straight back.

4. 04
   Count every screen

   Note laptop and tablet time too, since some students in the 2026 trial simply moved their watching there.

5. 05
   Compare both numbers

   A drop of about 20 to 40 minutes a day matches the studies, and if pickups didn't fall, add something aimed at checking.

For a sense of scale, one Healthline writer's two-week try took her weekly average from 2 h 45 min to 2 h 27 min. That's one person, so it's an anecdote, and she said she'd use grayscale short-term rather than forever.

Pair it with changes that target the checking habit

The bundles that helped most added a few blunt changes: notifications off, social apps moved off the home screen, the phone kept away from bed. I go through these in using your phone less without deleting apps. If nights are the issue, distance beats color, and this guide to scrolling in bed covers how.