Block AI apps. Guess to unlock.

Unfog asks for your guess before ChatGPT opens, then lets you in for 15 minutes.

Download on the App Store
+3°lock-in AI app · fogged IdeaJot it, don’t prompt it Your guess42 meet nimbus

What asking AI for everything costs

People will send ChatGPT 2.5 billion prompts today.

0sent since you opened this page. About 29,000 a second.

OpenAI, via TechCrunch, 2025

83% couldn’t quote a single line of the essay they’d just written with ChatGPT.

Minutes after writing it. Their brain scans showed the weakest engagement of any group.

MIT Media Lab, 2025 · preprint

Students who practised with ChatGPT did 17% worse once it was taken away.

Worse than students who never had it. The answers came from the AI; the learning didn’t stick.

Bastani et al., PNAS, 2025

By 2030, data centres will use more electricity than all of Japan.

AI is the biggest reason why. Every prompt you send runs in one.

IEA, Energy and AI, 2025

Which ones sound like you?

Tick every one that’s true.

Signs you lean on AI

Show me the way out

Get hooked on thinking instead

The app that puts your own brain first, every time you reach for AI.

Unfog's fog clearers: Deal me one, Sky check, Lock-in, Uses for a thing and Tiny writing, each worth a degree or two Unfog's Sky tab: Nimbus in the sun over a green hill, saying you did 86% of today's thinking, and today's weather at 41 degrees, clear Unfog's panic button: a storm warning, Nimbus breathing, a 90-second countdown and room to think it through Unfog's journal at night: Nimbus asleep and the line, Today, without AI, I wrote my own cover letter

Guess first

Open ChatGPT and a fog screen asks for your guess first. Wrong is fine. Lock it in, your sky warms a degree, and your AI apps open for 15 minutes.

12 ways to unfog

No guess in you? Earn it another way: search without AI answers, jot it on Brain Notes, walk it out, ask a human. Or let Nimbus deal you one.

Unfog's fog clearers: Deal me one, Sky check, Lock-in, Uses for a thing and Tiny writing, each worth a degree or two

Your brain’s weather

Thinking first warms your sky. Opening AI without a guess cools it. Every morning starts from your seven-day average, and every degree shows where it came from.

Unfog's Sky tab: Nimbus in the sun over a green hill, saying you did 86% of today's thinking, and today's weather at 41 degrees, clear

Breathe it out

About to cave? The panic button gives you 90 seconds of calm, and room to think it through, before you decide.

Unfog's panic button: a storm warning, Nimbus breathing, a 90-second countdown and room to think it through

One line a night

Before bed, finish one sentence: Today, without AI, I… Nimbus settles the day’s weather and drifts off.

Unfog's journal at night: Nimbus asleep and the line, Today, without AI, I wrote my own cover letter

Meet Nimbus

A small cloud who wears your brain’s weather. Think for yourself and he clears up. Hand it all to AI and he fogs over.

You did 86% of today’s thinking. Sunny!

Nimbus’s weather

Fair questions

Does it block AI for good?

No. It fogs over the AI apps you pick and asks for your guess first. Guess, or skip it and let your sky cool a degree, and they open for 15 minutes. The choice stays yours.

Which AI apps does it work with?

The ones you pick through Apple’s Screen Time: ChatGPT, Claude, Gemini, Copilot and the rest, apps and websites both.

Is there AI inside Unfog?

None at all. The only brain doing the work is yours.

What can Unfog see?

Only the AI apps and sites you pick, and what you do there never leaves your phone. It can’t see AI built into your keyboard, search or the operating system.

Don’t quit ChatGPT. Make it wait.

Download on the App Store