The 'Toothbrush Test' That Killed 100 Products: How Larry Page Made Google Say No to Everything — Unless You'd Use It Twice a Day

The Meeting Where Google Started Saying No

It was March 2013, and Larry Page had just taken over as CEO of Google for the second time. The company had 55,000 employees, operated in 40 countries, and was running over 200 active product experiments. Page walked into a product review meeting, looked at the list of initiatives, and asked a question that made the room go silent:

"How many of these would you use twice a day?"

No one answered.

Page crossed out half the list. Then he crossed out half of what remained. By the end of that meeting, Google had killed 23 active projects, including a social layer inside Gmail that engineers had spent 18 months building.

Larry Page had just invented what would become Silicon Valley's most influential product philosophy: The Toothbrush Test.

The Philosophy Born From Chaos

When Page returned as CEO in 2011, Google was drowning in its own success. The company had launched Google+, Google Wave, Google Buzz, Google Reader, Google Health, Google PowerMeter, Google Notebook, and dozens of other products — many of which nobody used, few of which talked to each other, and all of which diluted the core mission.

Page saw the problem immediately: Google had become a company that launched products because it could, not because it should.

He needed a filter. Something simple enough that any product manager could apply it in five seconds. Something brutal enough to kill 90% of ideas. Something that aligned with Google's mission to organize the world's information and make it universally accessible and useful.

The answer came from watching his kids brush their teeth.

The Two Questions That Define Everything

Page distilled his entire product philosophy into two questions:

1. Is this something you would use once or twice a day?
2. Does it make your life better?

Both had to be true. If either was false, the project died.

The logic was simple but brutal. A toothbrush is essential — you use it twice a day, and your life is genuinely worse without it. That's the bar. If your product isn't as essential as a toothbrush, why should Google build it?

Search passed. Gmail passed. Maps passed. Android passed. YouTube passed.

Google+? Failed. You might check it once a week, but you didn't need it twice a day. Google Wave? Failed. It made collaboration more confusing, not better. Google Buzz? Failed on both counts — annoying and useless.

Page started applying the Toothbrush Test to every product review, every acquisition discussion, every strategic planning meeting. If you couldn't answer both questions with an immediate "yes," your project was dead.

The $3.2 Billion Acquisition That Almost Failed the Test

In June 2013, three months after Page formalized the Toothbrush Test, Waze's founders flew to Mountain View to discuss a potential acquisition. Google was offering $1.3 billion for the Israeli navigation startup. Apple and Facebook were circling with competing offers.

Page sat across from Waze CEO Noam Bardin and asked the question: "Would people use Waze twice a day?"

Bardin knew the answer had to be more than "yes" — it had to be visceral. He pulled up Waze's retention data. The average user opened the app 2.7 times per day. Commuters used it every morning and evening. Some users opened it even when they weren't driving, just to check traffic conditions.

Then Bardin showed the second metric: accident avoidance. Waze users avoided an average of 3.2 accidents per year by getting real-time alerts about hazards. The app wasn't just useful — it was making lives measurably better.

Page nodded. "That passes."

Google acquired Waze for $3.2 billion (after a bidding war with Facebook drove the price up). Today, Waze has over 150 million monthly active users and powers much of Google Maps' real-time traffic data.

The Toothbrush Test had just validated a $3 billion bet.

The Products That Died on the Bathroom Floor

But for every Waze, dozens of projects failed the test and died quietly.

Google Reader? Used once a day by power users, but not essential for the average person. Killed in 2013. Google Health? Used maybe once a month to check medical records. Killed in 2011. Google+ Photos? Used occasionally, but not daily. Killed in 2015 (though the photo technology was salvaged and became Google Photos — which DID pass the test).

The most painful kill was Google Glass.

In 2012, Glass was Google's moonshot — a wearable computer that would change how humans interact with information. Sergey Brin wore it everywhere. The press called it revolutionary. Google had invested hundreds of millions.

Page applied the Toothbrush Test.

Question 1: Would you use it twice a day? Unclear. Early adopters wore it constantly, but normal people took it off after the novelty wore off.

Question 2: Did it make your life better? Mostly no. It made you look weird in public, it had a 45-minute battery life, and it solved problems most people didn't have.

Page pulled the product from consumer release in 2015. Glass survived as an enterprise product (factory workers and surgeons used it daily), but the consumer dream died because it failed the toothbrush test.

The Spreadsheet That Changed Product Management

By 2014, every product team at Google was required to fill out a "Toothbrush Test Scorecard" before presenting to leadership. The document had two sections:

Daily Use Case:

• What is the specific reason someone would use this product twice a day?
• What triggers that usage? (Morning alarm? Commute? Work start? Lunch? Evening?)
• How long does a typical session last?
• What happens if the user skips a day? Do they feel the absence?

Life Improvement Metric:

• What specific problem does this solve?
• How do you measure that the user's life is better?
• What is the quantifiable improvement? (Time saved? Money saved? Stress reduced? Connections made?)
• If this product disappeared tomorrow, would users actively look for a replacement?

Product managers hated it at first. The questions were uncomfortable. Most product ideas couldn't answer them honestly.

But that was the point.

Sundar Pichai, who would later become CEO, loved the framework. He used it to kill bloated features in Chrome and Android. "If we can't explain why someone would open this twice a day," Pichai told his team in 2014, "we're building the wrong thing."

The Lesson That Escaped Into the Wild

The Toothbrush Test leaked into Silicon Valley's collective consciousness around 2014. Reid Hoffman mentioned it on his podcast. Ben Horowitz wrote about it in a blog post. Y Combinator started teaching it to startups.

Suddenly, every pitch meeting in Silicon Valley included the phrase: "This is a toothbrush product."

Snapchat passed — teens checked it dozens of times per day. Instagram passed — people scrolled it morning, noon, and night. Slack passed — work teams lived inside it from 9 to 5 (and beyond). Spotify passed — commutes, workouts, cooking, working — music became ambient.

But thousands of startups failed the test and died in the process. Social networks for pet owners. Productivity apps that required 30 minutes of daily journaling. Meditation apps that demanded you sit still for an hour.

The test became a kind of product strategy North Star: If you can't get people to come back twice a day, you don't have a habit. If you don't have a habit, you don't have a business.

The Irony: Google's Biggest Miss Passed the Test

The darkest irony of the Toothbrush Test is that Google's biggest strategic failure of the decade — losing social networking to Facebook — happened even though Facebook would have passed with flying colors.

In 2011, when Google launched Google+, Page knew Facebook was a toothbrush product. People checked it 14 times a day. It made their lives better by keeping them connected to friends. By every metric, Facebook was essential.

But Google+ wasn't. It was a defensive move, not a daily habit. Users joined because Google forced them to (by tying it to YouTube comments), not because they needed it twice a day.

Page knew this. The Toothbrush Test would have killed Google+ before launch. But Google built it anyway, driven by fear of missing out on social.

By 2018, Google+ was dead. Facebook had 2.3 billion daily active users.

The lesson: Even when you know the right framework, corporate politics and strategic fear can override good judgment.

The Test's Second Life: AI Products

In 2023, the Toothbrush Test came roaring back.

Sundar Pichai, now Google's CEO, applied it to every AI product proposal after ChatGPT launched. Would people use Bard twice a day? Would they use AI-powered search twice a day? Would they use Gemini twice a day?

The answer was unclear, and that terrified Google.

ChatGPT was passing the test for millions of users — students used it for homework, developers used it for coding, writers used it for drafting. It was becoming a daily habit.

Google's response was to integrate AI everywhere: search, Gmail, Docs, Sheets, Meet. The strategy was clear — if standalone AI products were hard to make essential, embed AI into products that were already toothbrushes.

Time will tell if it works.

The Legacy: A Product Philosophy That Outlived Its Creator

Larry Page stepped back from active management of Google in 2019. But the Toothbrush Test remains embedded in the company's DNA.

Every product review at Google still asks the two questions. Every acquisition discussion still applies the framework. Every PM interview at Google includes a question about how you'd apply the Toothbrush Test to a hypothetical product.

Beyond Google, the test has become shorthand for product discipline across the industry. When a startup founder pitches a VC, the first question is often: "Is this a toothbrush?"

The beauty of the framework is its simplicity. You don't need an MBA to understand it. You don't need analytics dashboards or user research panels. You just need to ask yourself: Would I use this twice a day? Does it make my life better?

If you can't answer yes to both, you're building a vitamin, not a painkiller. You're building a nice-to-have, not a must-have.

You're building something people will forget about in a month.

The Two Questions That Still Matter

Larry Page's genius wasn't inventing a new product strategy — it was distilling an obvious truth into two unforgettable questions.

Great products aren't just useful once in a while. They're not just clever solutions to interesting problems. Great products become part of your daily routine. They become so essential that forgetting them feels like leaving the house without your phone.

That's the bar.

Not "would someone pay for this?" Not "is this technically impressive?" Not "does this use the latest AI model?"

The only questions that matter: Would you use it twice a day? Does it make your life better?

Everything else is noise.

In 2013, Larry Page killed 100 products by asking two questions.

In 2024, those same two questions are still killing bad ideas — and creating the products that define our lives.