We build useful software.

Coltsen is a small, independent software company founded in 2026. We design, build, publish and run our own consumer apps, and we plan to grow a portfolio of them over time.

What we make

We’re starting with personal budgeting. After that we expect to work on productivity tools, utilities and other everyday software.

Each product has its own name, look and audience. Some will be subscriptions and some one-time purchases, depending on the product.

How we work

Good software should feel considered rather than complicated. You should be able to use it without a manual, and it shouldn’t be crowded with features you don’t need.

We care about design, reliability and privacy. We use automation and AI when they help and skip them when they don’t.

No client work

We don’t build software for other companies. Every app we release is ours, and we keep improving and supporting it.