CatBrains
CatBrains — a Korean palace gate with the CatBrains signboard, watched over by two winged cats

Independent software house

CatBrains

Purr-fection in balance. Quiet elegance of every move.

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Inside CatBrains

What goes into every app.

Native

Rooted in the platform.

Built natively for Apple platforms, never a port or an afterthought. Every app feels fast, smooth, and genuinely at home on your device.

Native first, nothing less

Design

Made to feel calm.

Quiet elegance over noise. When nothing distracts, everything shines. Clean surfaces, considered motion, and not a single dark pattern to trip you up.

Pure, not plain

Trust

Earned, tap by tap.

Every tap is a promise. We ship modestly and often, fix what matters, and leave the best feature as the one we had the courage not to add.

If you have to think about us, we’ve lost
Every tap is a promise. No dark patterns.

CatBrains Rules

Sonnets
Daily Photo Journal

Sonnets

One Day. One Photo. One Note.

Now available

Sonnets turns your calendar into a daily photo journal. Each day's cell waits for one photograph and a short note, and watching a month slowly fill in becomes its own quiet ritual. Everything stays on your device. No accounts, no uploads, no tracking. Just a small, private place for the days you want to remember.

Lately

Built,
quietly.

The apps we keep coming back to. Small, sharp, and built to last.

Team

Few of us.
Lots of care.

Stretched, scratched, and shipped with care.

Get started

Start small.
Stay sharp.

A handful of focused apps. Start with one, keep what earns its place.