Who is behind CS42?
CS42 is an independent development studio. Our team builds the things we find useful ourselves, then puts them somewhere other people can use them too.
Everything starts the same way: something looks like it could be built better, or built at all, so we build it and see. Some of it turns into a product; some of it stays a small tool that does one useful thing. Either way it goes out where people can use it.
We try to keep our apps free of ads and friendly to the people using them. Nothing is designed to keep you in an app longer than you meant to be, and we ask for nothing a feature does not genuinely need.
The tools follow the problem rather than the other way round. Swift for the iPhone apps, Python for the vision and drawing models, and plain web code for anything that should just open and work. PunchTrack and PixelThat came out of that, and so did the object detection and sketch recognition you can try on this site.
Nothing here is a mockup. The models are real models, the multiplayer quizzes really connect players, and PunchTrack and Sukoon are on the App Store with the rest close behind.
What gets built.
Native iOS apps
Native iPhone apps written in SwiftUI. Private by default, and perfectly happy without a connection.
See the appsMachine learning
Models built in Python and put somewhere you can actually use them. Object detection, calorie estimates, sketch recognition.
Try themSmall useful things
Quizzes, games, a piano, calm tools. Quick to open, easy to put down, nothing to install.
Everything on CS42How we work.
- Privacy first. On-device by default. We ask for data only when a feature genuinely needs it, and we say so plainly in the privacy policy.
- Bilingual where it counts. English and Arabic, with layouts that read correctly in both directions.
- Free, and no ads. Our apps carry no advertising and no in-app purchases. If a feature would only exist to sell you something, it does not get built.
- Ship, then listen. Experiments go out early so real use can shape what comes next.
An app you wish existed?
Tell us about it. If it is something people would enjoy or find useful, the team will be glad to build it and put it out for everyone to use for free. We are open to partnerships too, and happy to answer questions about anything here.