macOS · free · MIT

A pet rock
for your focus.

Boulder can’t die. It just grows — one pixel at a time, every minute you focus. After a year, you’ve built a small mountain.

Free · MIT licensed · ad-hoc signed · macOS 14+

How it works.

Three steps. No streaks. No shame.

Code, write, read, design — or roll your own custom tag. Each kind of focus stamps a different texture into your Boulder.

Pixel by pixel, in real time. The longer you focus, the bigger Boulder gets. Stop and Boulder pauses — it doesn’t shrink.

Release it into the sea. It joins your Mountain Range — the panorama of every Boulder you’ve ever grown.

A focus app that respects your time. Shipping today.

Custom tags

Make your own focus categories. Cooking, journaling, whatever. Each one stamps Boulder its own way.
Commitment sessions

Set a countdown when you mean it. Give up early and pay a small pixel penalty. Stick it out and Boulder rewards you.
20 shades of granite

Real depth, not a gradient. Every pixel is hand-shaded by the type of focus that made it.
Click to inspect

Tap any pixel to see what you were focused on the minute you grew it. Boulder is a time map.
Mountain Range gallery

Every Boulder you’ve ever released lined up in a panorama. Years of focus at a glance.
Momentum multiplier

Keep coming back. Boulder ramps from 1× up to 3× as your tier builds — without a single guilt-trip notification.

Boulder is for people Forest stresses out.

Forest punishes you. Focus Friend guilts you. Boulder can’t die. Break focus and it just pauses — no streak, no shame.

No fixed intervals. Focus for 20 seconds or 4 hours — Boulder grows the whole time. Outcome over streaks.

Shaped by your focus mix, no two are alike. The signature of your year, as a chunky pixel sculpture.

MIT licensed. Tip on Cash App if you like it. Star the repo. That’s the whole business model.

It can’t die. It just grows.