We build things that are useful to people. Apps, tools, games, whatever is useful. We work at speed. An idea comes up, we let it brew, we build it, we put it in front of people and see if it holds. Kalamun, Kuttab and Sidecook are the first. They won't be the last.

Questions, or want to hear when the next one ships? Write to hello@40eves.com.

Everything we make has to be worth someone's time. Not interesting, not impressive. Useful. That is the only test. If an app doesn't make someone's day a little easier, a little better, or teach them something, we don't release it.

Some of what we build is for everyone. Some is for a few thousand people who share one specific problem. Both matter. A tool that a small group can't live without is worth more than an app millions download and forget.

Every app should be obvious the first time you open it. No manual, no tour, no settings to figure out. We cut until only what matters is left. One clear way to do each thing, plain words on every screen. Simple is harder to build, so we do the hard part for you.

We go from idea to working version in days, not months. Then we iterate. Ship, watch, fix, ship again. Every round is small, so every round is fast, and the app gets better each week instead of each year.

Agentic tools changed what a small team can do. Work that used to take a department now takes a few people and a week. We use them for everything we can: code, design, testing, content. That frees us to spend our own time on the part that matters most, deciding what is worth building.

An idea isn't real until people use it. So we ship early, watch what happens and listen. We keep what works and drop what doesn't. No sunk costs, no ego. Then we add the next one.

The obvious version of an app already exists. Ours has to bring something new: a better idea, a simpler way, a reason to switch. We would rather try something odd and fail than ship a copy and succeed.

Forty is the number of completeness. Forty days, forty nights, forty years: in story after story it's the time it takes for something to become whole. An eve is the evening before something begins. It's when you prepare for tomorrow.