Duolign Join the waitlist
Launching in the new year · join the waitlist to hear first

Your household money, finally aligned.

One shared plan for bills, savings, debt and payday — while keeping your personal money yours.

Duolign isn’t another banking app. It’s the layer that coordinates the two of you.

UK households only. We’ll email you when we launch, and nothing else unless you tick the box.

Encrypted in transit & at rest Add it by hand or by statement, no bank login needed Duolign never moves your money
Duolign's payday screen for both partners, on an iPhone and an Android phone: Alex's view in light mode and Sam's in dark mode, each listing exactly what to send to each account.
Payday

From payday scramble to five minutes.

The maths runs across both incomes and every joint obligation. You get a checklist.

  • Exactly what to send, to the penny
    One amount for each account. Tap an amount to copy it into your banking app, and you're done.
  • Your personal allowance is protected
    Once the joint transfers are done, whatever’s left in your personal account is yours to spend. No oversight, no guilt.
Built for two

One household. Two people. One agreed plan.

  • Both incomes
    See the household picture across both partners, not just your own accounts.
  • Shared decisions
    Changes to a shared target need approval from both partners before they take effect.
  • Personal money stays personal
    Once your household commitments are covered, what’s left in your own account is yours.
Partner approval

No one changes the household plan alone.

Any tweak to a shared target needs a tap from both phones before it takes effect.

  • Request sent
    One partner proposes a change — say, increasing the holiday fund target.
  • Partner reviews
    The other partner sees exactly what’s changing, and why.
  • Plan updates
    Only once both agree does the shared plan actually change.

Your money should be shared by agreement, not changed by surprise.

One view

Every account, card and bill. One place.

Stop opening four banking apps to work out what the household actually has left this month.

  • Add it by hand, or upload a statement
    Type in your balances yourself, or drop in a PDF or CSV export from Monzo, Starling, Barclays, Lloyds, HSBC and more — Duolign reads the transactions straight off it, no bank login required. Your data stays entirely under your control.
  • Shared the moment it’s in
    Enter it or upload it once, and you’re both looking at the exact same numbers — no more texting screenshots back and forth.
  • One number that matters
    What’s genuinely left across everything — not four balances you have to add up in your head.
Look forward

See where the money’s taking you, not just where it went.

Duolign models the months ahead so a decision made today has a number attached to it.

  • Surplus routed to your priorities
    Once the bills and baselines are covered, the household surplus goes where you both agreed — paying down debt, or savings towards a deposit, a wedding, next year’s holiday.
  • Avalanche and Snowball, side by side Premium
    Avalanche saves the most interest; Snowball clears balances fastest. Duolign shows the exact month you’re debt-free on either plan.
  • A forecast five years ahead Premium
    See where your savings and debts are heading, in an expected, a cautious and a stress view. Then ask it: what if one of us loses our income, earns more, or we save for a deposit? Every answer shows how it was worked out, and nothing you try touches your real plan.
  • A health check, not a score
    Six areas, from cash flow to how long your savings would last, each with a status and the figure behind it. Where Duolign doesn’t know enough, it says so rather than guessing.
Avalanche
Feb 2027
Least interest paid
Snowball
Apr 2027
First balance clears sooner
How it works

Five minutes to get your household sorted.

  • 1
    Add your accounts
    Both partners upload a bank statement or enter their figures by hand — no bank login needed to get started.
  • 2
    Set your household plan
    Tell Duolign about your bills, savings, debts and how you want to contribute.
  • 3
    Get your payday checklist
    Duolign calculates exactly what each of you needs to transfer.
  • 4
    Both partners approve changes
    Shared financial decisions need both people to agree.
  • 5
    Get on with your month
    Your personal money stays yours. Your household money has a plan.
On your phone

Built for a pocket, not a spreadsheet.

  • Notifications for the things that matter
    Your partner wants your OK on a change, your pay has landed, or a statement is due. Nothing else.
  • Biometric unlock
    Face ID, Touch ID or Android biometrics. A PIN as the fallback.
  • Copy an amount, paste it in your bank
    Every figure on the payday checklist is one tap to your clipboard.
Launching in the new year · join the waitlist to hear first

Stop doing your household finances in your head.

Get your payday plan ready before Duolign launches.

iOS & Android at launch · UK households only.