Consumer-AI app studio
Tools that mark the way.
Cairnby builds calm, precise consumer-AI tools. Two apps to start: Headroom, for what’s yours to spend, and Serai, the haven for all you own.
Headroom · Budgeting
What’s yours to spend.
Bills, goals, and income resolve into one honest safe-to-spend number — so you always know where you stand.
Get Headroom
Serai · Assets & documents
The haven for all you own.
Every asset, receipt, and document, quietly kept in one private place — captured by AI, found in seconds.
Explore Serai
The studio
Clear before clever. Calm by default. On your side.
We build consumer-AI tools that respect your attention and your data. No dark patterns, no noise — just precise instruments that help you decide, and get out of the way.
The Cairnby way
The AI does the busywork
Statements read themselves. Records file themselves. You get the answer, not the admin.
You stay current effortlessly
No weekly upkeep, no manual syncing — your picture refreshes on its own.
You always know where you stand
One honest number, one findable record — clarity at a glance.
Notes from the Journal — on money, ownership, and calm software.
Your data is encrypted and yours — never sold.