Futari

AA-split couples ledger

You agreed to split fairly. Now how do you keep track?

50/50, taking turns, splitting by category — whatever your system, Futari logs it and keeps the running balance. No mental accounting, no end-of-month arguments.

  • "We said we'd go AA, but we never know who owes what."

    The hard part of AA isn't the decision — it's the tracking. Futari logs each expense with who paid and how it's split, then accumulates the balance automatically. You always know where you stand.

  • "We take turns paying, but the amounts are never equal."

    Alternating who pays looks fair in practice, but the amounts diverge over time. Futari records every transaction and shows the real balance — so fairness is measured in numbers, not turns.

  • "Some costs are AA, others are covered by one of us — we need both."

    Futari supports multiple split modes in the same ledger. One expense can be 50/50, another fully covered by one person — no need for separate tracking.

How Futari helps

  • Flexible split modes

    50/50, by income ratio, or one person covers it all — pick a mode and Futari handles the math automatically.

  • Real-time sync

    One person records something and the other sees it instantly. The ledger is the conversation.

  • End-to-end encryption

    Your ledger is visible only to the two of you. The server never decrypts what you record.

  • Chapter-based history

    Moving in, getting married, new job, new home — each life chapter becomes a new ledger chapter. The past is always there to look back on.

Start tracking for free

Common questions

What's the best app for an AA-split relationship?
Futari is a shared ledger built for two people from day one. It supports 50/50, income-ratio, and one-person-covers modes — and calculates the balance automatically so you never have to do the mental maths.
How do I track taking-turns payments in Futari?
Log each payment in Futari and mark who paid and how it's split (50/50 or one person covers). The balance accumulates over time, so you always know the current state — even when turns are uneven.
Is Futari free?
Yes — the shared ledger, split modes, real-time sync, and encryption are all free.

Other situations