See where you stand.
Decide what's next.
Cairn is a personal-finance app that watches quietly, holding your accounts, cash flow, and goals in one considered view. Walk the whole app right now, filled with a sample household's numbers.
The demo is the whole app; the preview is five sample households, two screens each. Nothing to install, nothing saved. Cairn is in closed beta, so sign-in is by invite, and you can ask for one.
Connect
Plaid-secured account aggregation. Cairn never sees your credentials.
See
Net worth, cash flow, runway, and a 60-day forecast in one editorial view, with no scrolling for context.
Plan
One “extra per month” dial moves every goal’s date at once, under a balanced, debt-first, or safety-first lens.
A preview, right here
See what Cairn would notice.
Your money, out of the dark. Cairn watches quietly and speaks only when something's worth your attention, whether that's a projection, a gap, or cash sitting idle. Pick the situation closest to yours and see the read.
A healthy balance, most of it parked in checking earning nothing.
What stands out
Why you’re seeing this
Sample figures, not advice. Cairn shows you the shape of things; the choices stay yours.
Restraint, in writing
Some lines we won't cross.
Written down so you can hold us to them. Restraint is a feature.
No ads. No paid placement.
Cairn will never sell your attention to a credit-card pitch or steer you toward a kickback. Nothing it surfaces is paid to be there.
No selling your financial data.
Not de-identified, not aggregated, not “anonymized.” Your transactions, balances, and goals are yours alone.
No streaks, badges, or nudges.
Your money isn’t a game. Cairn won’t guilt you into opening the app or chase you with notifications.
From the studio
A note from nnnsightnnn.
I built Cairn because the money tools I tried made me feel watched, not supported. Streaks I didn’t sign up for. Notifications timed to my anxiety. A dashboard that always wanted me to do more. None of it made me better with money, only more aware of being measured.
I want Cairn to feel like a walk on a familiar trail. You glance at where you are, you decide what’s next, you go back to your life. The app shouldn’t need you any more than that.
nnnsightnnn is a studio of one. No investors waiting on growth, no roadmap dictated by a sales team, no incentive to make Cairn louder than it needs to be. The product can stay small because the company is small.
If Cairn ever stops feeling quiet, that’s a bug: a feature that pushes, an email that guilts, a screen that tries too hard. Tell me about it.
nnnsightnnn
Under the hood, brought to the surface
Three things Cairn cannot do.
Structural limits come first: can't, never won't. Then the protections that already run on every AI call, which the Trust Center lets you watch work.
Move your money.
There is no transfer, no payment, and no trade anywhere in Cairn. It reads your accounts and shows you where you stand. That limit is built into the code, not written in a policy.
See your bank password.
You sign in at your bank, through Plaid, and the credential stays there. Cairn receives read-only access that you can revoke at any time, even from outside the app.
Hand your transactions to an AI.
Cairn's own planner computes every number you see. The AI is given only the small summaries it narrates, under zero data retention, and your data is never used to train anything.
Allowlisted models only
Financial data only ever routes through vetted models. An unknown vendor is refused outright.
client.ts
Daily spend caps
Hard input/output token limits per day, enforced before any call runs.
guard.ts
Counts, never content
We log what ran and how much, never your prompts or financial details.
log.ts
Your off switch
A per-account toggle disables AI entirely. Your call, always.
aiEnabled
Human-approval queue
AI proposes; you dispose. Suggestions wait for your confirm.
AiSuggestion
Cited answers
Ask about your money and every answer links the exact transactions behind it.
transactionsQa
The business, plainly
How Cairn pays for itself.
- Today
- Cairn is free while it’s in closed beta. No card on file. No trial countdown.
- Tomorrow
- A single subscription. One price, no tiers, no upsell, no surprise charges.
- Never
- Investors waiting on growth, ad inventory, or your financial data brokered to anyone.
If the subscription doesn’t sustain Cairn, Cairn doesn’t survive. That’s the right tradeoff. Better a small product that pays for itself than a loud one funded by selling your attention.