Do Not Churn

Why software is about to stop having an interface

A look at Thesys and Flipbook - what Y Combinator, Anthropic, and the SaaS incumbents are slowly turning into substrates are telling us about who…

Apr 30 • Daria Littlefield

How Claude Design absorbed the last human-owned step in vibe coding

And what it reveals about the kind of churn no moat was built.

Apr 22 • Daria Littlefield

Churn is just graduation you didn't design for.

Cabinet, Mem, and NotebookLM show what happens when a personal knowledge base hits its ceiling.

Apr 15 • Daria Littlefield

The unfair advantage you can't hire for

In the era when anyone can build an app, the founders who win are the ones who know the problem too well to let someone else solve it.

Apr 1 • Daria Littlefield

March 2026

The Retention Wall is dead. Here's what replaced it.

Amazon Prime, Netflix, and Lovable reveal three different beliefs about what a churning customer actually is.

Mar 25 • Daria Littlefield

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When everyone can build, nobody gets found

Inside the AI tools racing to solve the attention problem that vibe-coding created

Mar 18 • Daria Littlefield

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What Cal AI's 0$ to $50M ARR story reveals about the new app economy

A 19-year-old just sold his app to the #1 competitor in the category. He built it in high school classrooms. $0 to $50M ARR in 18 months. 7 employees.

Mar 4 • Daria Littlefield

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February 2026

Which apps are built to stay and which get vibe-coded away

Today anyone could ship a habit tracker in a weekend. So now the question is: what makes an app impossible to leave?

Feb 24 • Daria Littlefield

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ADHD mainstream got focus apps split into three paths

Apps stopped selling "better blockers" and started selling "when do you need help?" - before distraction, during work, or when willpower fails.

Feb 18 • Daria Littlefield

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From swipe fatigue to IRL: Inside the apps racing to get you off your screen

How Hinge, Timeleft, and Thursday are turning loneliness into a $20M+ opportunity by optimizing for outcomes

Feb 10 • Daria Littlefield

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Is 'app-of-apps' becoming the new interface for work and life?

How autonomous assistants reduce clicks, decisions, and mental overload

Feb 2 • Daria Littlefield

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January 2026

Why AI note-taking tools no longer compete on features

Instead, hey compete on intent: preserving decisions, building understanding, or capturing ideas before they cease to exist.

Jan 26 • Daria Littlefield

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