⚡ Earn your distractions

Don't let social media ruin your only brain.

Sphinx locks the sites that eat your day. To get in, you don't wait out a timer — you solve a quick math or coding problem. Beat it and you've earned a timed session. Every relapse becomes a rep.

No account. No tracking. Everything runs locally in your browser.

LOCKED · you reached for a distraction

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Brainteaser
A patch of lily pads on a lake doubles in size every day. It takes 48 days to cover the whole lake.
How many days to cover half the lake?
Watch the trap
The fast answer is 24 — but doubling isn't linear. If it's full on day 48, work backwards: the day before, it was half.
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