Cairn tells you exactly what's safe to spend today. Everything you don't spend adds to your stack — no categories to fight with, no spreadsheet to maintain.
They want every transaction categorized, every account connected, a whole financial philosophy adopted on day one. Most people quit within a few weeks — not because the apps are bad, but because daily money management shouldn't feel like a second job.
Rent, subscriptions, groceries — whatever's recurring and non-negotiable.
Cairn splits what's left across the month, so you always know what's safe to spend today.
No penalty either way — but what you don't spend builds toward your next level.
Early testers get first access and shape what ships.