Crosswords vs. Brain Training Apps: What the Science Says

You settle into your morning routine, coffee in hand, pen poised over the crossword, when an ad on your phone catches your eye: Train your brain in just 15 minutes a day! The brain training app market is now worth billions, and suddenly your trusty crossword puzzle feels a little old-fashioned. Should you trade your pen and paper for a sleek app?

Probably not. Science says your crossword habit is doing more for your brain than you might think. And the fact that you're solving it on paper with a pen? That matters too.

Crosswords Beat Computer Games in a Landmark Trial

If you've been doing crosswords for years, you'll like this. A 2022 study published in NEJM Evidence put the question to a rigorous test: crossword puzzles versus computer-based brain games, head to head, over 78 weeks [1].

The study, led by Dr. D.P. Devanand at Columbia University and Duke University, enrolled 107 adults with mild cognitive impairment (MCI). Half were assigned to web-based crossword puzzles, the other half to computerized cognitive games. At both 12 weeks and 78 weeks, the crossword group performed significantly better on the Alzheimer's Disease Assessment Scale, a standard measure of cognitive function. While the games group showed slight cognitive decline over the study period, the crossword group actually improved [1].

The brain scans told an even more interesting story. The games group experienced greater hippocampal volume loss and cortical thinning, both structural brain changes associated with cognitive decline, compared to the crossword group [1]. Crosswords didn't just help people perform better on tests. They appeared to help protect the brain itself.

The findings were significant enough that a larger follow-up trial, COGIT-2, is now underway with brain imaging and biomarker outcomes [7].

The Long Game: Crosswords May Buy You Years

A single study is encouraging. But what about over a lifetime?

An earlier investigation from the Bronx Aging Study helps answer that. Researchers followed 488 older adults over many years and found that regular crossword participation delayed the onset of accelerated memory decline by 2.54 years in those who eventually developed dementia [2]. That's nearly two and a half extra years of sharper memory.

Why such a strong effect? Crosswords engage multiple cognitive systems at the same time: language processing, semantic memory retrieval, pattern recognition, and problem-solving. Each time you work through a tricky clue, your brain is pulling from its storehouse of knowledge while making new connections. Researchers believe this builds what's called "cognitive reserve," the brain's ability to compensate for age-related changes and even early disease [2].

Think of cognitive reserve like a savings account for your brain. Every crossword you complete is another deposit, and those deposits accumulate over years and decades.

There's a nuance worth knowing about. In the same study, researchers found that once accelerated decline did begin, it progressed faster in the crossword solvers than in non-puzzlers [2]. That sounds alarming until you understand what's happening: cognitive reserve allows the brain to function normally even as underlying disease builds up silently. By the time the brain can no longer compensate, the disease is more advanced, so the visible decline is steeper.

But what matters is this: those crossword solvers had years more of sharp, independent thinking before that tipping point arrived. They spent less total time in decline, not more. A later start to a shorter slide. Most people would gladly take that trade.

Why Solving on Paper Gives You an Extra Edge

The app makers won't mention this, but how you engage with a puzzle matters as much as what you're solving. And there's growing evidence that pen and paper offer something a screen simply can't replicate.

A 2024 study from the Norwegian University of Science and Technology used high-density EEG (256 sensors) to measure brain activity during handwriting versus typing. Handwriting produced far more elaborate brain connectivity patterns, activating widespread networks across parietal and central brain regions [3]. These connectivity patterns are the same ones research has linked to memory formation and encoding new information.

A 2025 review of 30 neuroimaging studies confirmed and extended these findings. Handwriting activates the sensorimotor cortex for tactile feedback, the visual word form area for letter recognition, the superior parietal lobule for spatial processing, and language centers including Broca's area [4]. That's a lot of brain real estate lighting up at once. And it's engagement that simply doesn't happen when you tap a screen.

What does this mean for crossword solving? When you fill in answers by hand, you're not just retrieving knowledge. You're physically writing letters, spatially navigating the grid, and coordinating visual, motor, and cognitive systems all at once. That multi-system workout is exactly the kind of activity neuroscientists associate with building and maintaining brain connections [3, 4].

There's also something to be said for the experience itself. No notifications. No algorithmic nudges. No screen glare. Just you, the puzzle, and the satisfying scratch of pencil on paper. Or pen, if you're feeling brave.

Variety Adds Even More Value

Crosswords are the star of the research, but they're not the only pen-and-paper puzzle worth your time. Sudoku exercises working memory and logical reasoning. Word searches sharpen visual scanning and pattern recognition. Acrostics and cryptograms draw on language skills in slightly different ways than crosswords do. Each type of puzzle emphasizes different cognitive systems, and that variety matters.

A large-scale study from the University of Exeter and King's College London looked at more than 19,000 adults aged 50 and over as part of the PROTECT study. They found that people who regularly engaged with both word puzzles and number puzzles performed significantly better on tests of memory, attention, and reasoning. On problem-solving tasks, regular puzzlers performed at a level equivalent to people eight years younger [9].

So if you love crosswords, keep them at the center of your routine. But mixing in a Sudoku or a word scramble now and then isn't a distraction. It's a way to challenge your brain from a different angle. Think of it like cross-training for athletes: the variety itself is part of the benefit.

What About Brain Training Apps?

To be fair, not all brain training apps are hype. One specific type of digital training, speed-of-processing training, has strong evidence behind it.

The ACTIVE study, the largest and longest brain training trial ever conducted, followed 2,802 adults aged 65 and older for 20 years. The results, published in February 2026, showed that participants who completed speed-of-processing training plus booster sessions had a 25% lower incidence of dementia compared to the control group [5].

But there's a big caveat. Memory training and reasoning training, the types that most brain training apps focus on, showed no significant benefit for dementia risk [5]. Only speed-of-processing training worked. That means most commercial brain training apps are based on training types that didn't move the needle in the largest study ever done.

The brain training industry also has a credibility problem. In 2016, Lumosity paid $2 million to settle Federal Trade Commission charges for deceptive advertising. As Jessica Rich of the FTC put it: "Lumosity simply did not have the science to back up its ads" [6]. And a broad research review found that while people improve on trained tasks, those gains rarely carry over to real-world skills. Researchers call this the "transfer problem" [8].

The Bottom Line: Your Crossword Habit Is a Brain Health Strategy

So where does this leave you? In a very good place, if you're a crossword lover.

Crossword puzzles outperformed computer games in a rigorous clinical trial [1], delayed memory decline by over two years [2], and build cognitive reserve that helps your brain weather aging. When you solve on paper with a pen, you're adding another layer of engagement that screens can't match [3, 4].

If you want to add a digital component, look for speed-of-processing training backed by peer-reviewed research. It targets different brain systems and has real long-term evidence behind it [5]. But be skeptical of apps making sweeping promises without published studies to back them up.

The strongest approach combines cognitive challenges with physical exercise, social engagement, and good sleep. No single activity is a magic bullet. But a daily crossword puzzle, solved with pen in hand? That's one of the most enjoyable and well-supported brain habits you can build.

Consistency matters more than intensity. So pour your coffee, pick up your pen, and enjoy the puzzle. Your brain is thanking you with every clue you solve.

For a complete guide to evidence-based memory strategies, see our pillar article: Keep Your Memory Sharp.

References

1. Devanand, D.P. et al. "Computerized Games versus Crosswords Training in Mild Cognitive Impairment." NEJM Evidence, 2022.
2. Pillai, J.A. et al. "Association of Crossword Puzzle Participation with Memory Decline in Persons Who Develop Dementia." Journal of the International Neuropsychological Society, 2011.
3. Van der Weel, F.R.R. and Van der Meer, A.L.H. "Handwriting but Not Typewriting Leads to Widespread Brain Connectivity: A High-Density EEG Study with Implications for the Classroom." Frontiers in Psychology, 2024.
4. Marano, G. et al. "The Neuroscience Behind Writing: Handwriting vs. Typing — Who Wins the Battle?" Life, 2025.
5. Coe, N.B. et al. "Impact of Cognitive Training on Claims-Based Diagnosed Dementia over 20 Years: Evidence from the ACTIVE Study." Alzheimer's & Dementia: Translational Research & Clinical Interventions, 2026.
6. Federal Trade Commission. "Lumosity to Pay $2 Million to Settle FTC Deceptive Advertising Charges for Its 'Brain Training' Program." 2016.
7. Wang, L.A. et al. "Protocol for the Cognitive Games and Impaired Thinking Study 2 (COGIT-2)." International Journal of Clinical Trials, 2025.
8. Gobet, F. and Sala, G. "Cognitive Training: A Field in Search of a Phenomenon." Perspectives on Psychological Science, 2023.
9. Wesnes, K.A. et al. "An Online Investigation of the Relationship Between the Frequency of Word Puzzle Use and Cognitive Function in a Large Sample of Older Adults." International Journal of Geriatric Psychiatry, 2019.