Sardine HarmonySardine Harmony
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The end of the "who owes what" group chat

Live together.
Actually stay friends.

Rent, utilities, that Costco run someone fronted — Sardine Harmony keeps every dollar between roommates fair, transparent, and settled, so the only things you're splitting are pizza and playlists.

  • Fair splits — custom shares or even down the middle
  • One glance shows exactly what you owe (or are owed)
  • Neutral AI mediator for the debates that get spicy
Start with your householdSee how it works

Free for your household · No credit card · Set up in under 2 minutes

Roommates laughing together while cooking dinner

Every bill, fairly split

Set shares once — by percentage, headcount, or custom amounts — and Sardine does the math on every rent day, utility bill, and grocery run. No spreadsheets, no napkin math, no "wait, how much do I owe again?"

Rent
$1,850
Utilities
$182
Groceries
$246
You're owed
$124.50
3 of 4 roommates settled
Two roommates checking Sardine Harmony on a phone

One home, one truth

Everyone sees the same numbers — no more "I already Venmo'd you… I think?"

A neutral referee when it gets awkward

Cleaning schedule blowing up? Broken blender? Log it, hear both sides, and let our AI mediator suggest a fair path forward — so nobody has to be the bad guy in the group chat.

Built to keep the vibes good

Money is the #1 thing roommates fight about. Sardine keeps it out in the open, off your dinner table, and out of your friendships — so home feels like home again.