s/4SOLIDUS 4
AN INDEPENDENT SOFTWARE STUDIO

Useful by nature.
Better by design.

Thoughtful tools for the way work actually happens. We’re starting small, learning as we go, and building things we want to use ourselves.

Meet our first ideas
Made with curiosity. Built for real life.
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A LITTLE STRUCTURE.
A LOT OF POSSIBILITY.
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01 / ON THE WORKBENCH

Two beginnings.
Plenty of possibility.

Different tools. One simple idea:
software should make the day feel lighter.

C
IN DEVELOPMENT

Copper Ledger

A clearer place for the business side of life. Bookkeeping and everyday operations, shaped by hands-on experience.

● ● ●Copper Ledger
C
A little more clarity.
YOUR BUSINESSIn view
YOUR WORKIn order
A closer look +

Our starting point is a practical bookkeeping app, with transactions, invoices, and employee time cards brought into a clearer workspace. Still being refined through everyday use.

IN DEVELOPMENT

Relay

A calmer home for email. An early exploration of a focused workspace that helps you find your place and keep things moving.

● ● ●Relay
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ImportantCalendarOther
A fresh startA little less noise. A little more focus.
Room to thinkYour work, at your pace.
Keep good things movingThoughtful details make a difference.
A closer look +

We’re exploring multiple email accounts, useful sections above the inbox, and a clean experience across Mac and iPhone. This is a working prototype, not a publicly released email service.

A peek at the direction, not a product launch. Illustrative previews shown. Neither app is available for public download yet.

We’re at the beginning.
That’s the exciting part.

Solidus 4 starts with a familiar question: could this work a little better?

We’re a small, early-stage software venture turning everyday needs into useful applications. A place to experiment, learn, refine, and enjoy the process of making something worthwhile.

No grand promises. Just care, curiosity, and the belief that good tools can make a real difference.

Useful first.Details matter.Keep learning.
A SMALL EXPERIMENT

Good ideas need
a little room to play.

Try a different light. The work stays the same.