Share expenses
without sharing
everything.
Private-by-default finance for couples who value autonomy.
How it works
Connect your bank
Link accounts via Plaid in under a minute. Your data stays yours.
Share what matters
Tap to share any transaction with your partner. Everything else stays private.
Settle up fairly
See who owes whom. One tap to settle. Done.
Your transactions, your rules
Every transaction is private by default. Tap the share toggle to split costs with your partner. No surveillance, just generosity.
See the full picture
Personal and shared spending insights, month over month. Track trends, spot patterns, understand where your money goes.
Shared expenses, visualized
See who paid what at a glance. Category breakdowns split by partner, with a radial chart showing the full picture.
Private by default.
Shared by choice.
Most couples finance apps start by sharing everything, then let you hide what you want. That creates a surveillance dynamic where privacy feels like secrecy. Harmonici flips it: everything is yours alone until you choose to share. Sharing is an act of generosity, not an obligation.