The app for fair co-parenting

A father and child share a joyful moment playing indoors on a sunny day.

About two fair parents and their app

Child holding hands with parents on a peaceful nature walk.

twofair is a straightforward app for CO-PARENTING that brings financial fairness to children’s cost.

Parents use twofair to find a clear, uncomplicated way to split child-related expenses fairly. The app has helped ease emotionally difficult situations and rebuild trust between parents, so the focus can return to what matters: the child’s wellbeing.

Everything you need to know about twofair

From adding your first expense to how much twofair actually takes care of for you — here are the answers to the questions we hear most often.

Do I need to use twofair together with my co-parent to get started?

No. You can start right away on your own and track expenses — you can send the invitation to the other parent whenever you’re ready.

Does twofair transfer money between us?

No. twofair isn’t a payment service. Settlement amounts are only recorded in the app — the actual money still moves via bank transfer, cash, or a payment app of your choice, outside of twofair.

How do I add a new expense?

Enter the amount, category, and date — description, child assignment, and receipt are optional. As you enter it, you’ll immediately see which share falls to whom.

Can I log an expense retroactively?

Yes, the date is fully adjustable — including dates in the past.

What happens if I choose a future date?

The expense is automatically marked as “planned” and appears under “Upcoming” — but it only affects the balance once that date arrives.

Can I restore an expense I deleted by accident?

Deleted entries aren’t removed right away — they’re only marked and hidden from the normal view, but still visible through a separate filter. Before deleting, the app asks you to confirm, with a note on how it affects the balance.

Can I manage categories myself?

Yes. Each family keeps its own categories, with a name and emoji icon you choose freely — new categories can be created right while adding an expense, without interrupting the flow.

Can recurring costs, like daycare or club fees, be tracked automatically?

Yes. When adding an expense, you can turn on recurring mode: monthly or yearly, with a start date and, optionally, an end date or a fixed number of repetitions.

Can I change the split ratio at any time, and does that affect expenses already logged?

You can change the ratio anytime in settings — but by design, it’s never applied retroactively. Every expense permanently keeps the ratio that was in effect when it was logged; a later change only applies to new expenses, so past entries stay untouched and your history remains traceable at all times.

Can someone change figures afterward without anyone noticing?

No. Every change is logged in a tamper-evident history — who changed what, and when, stays traceable.

Will I be notified when my co-parent logs a new expense?

By email — either as an immediate notice or as a weekly/monthly summary, depending on what you choose in settings.

How twofair came to be

twofair wasn’t designed on a drawing board — it grew out of a real separation. Two kids, a nesting arrangement: the kids stay in the shared home, the parents take turns moving in and out. That sounds like a good solution for the kids — and it is. But there’s one thing it doesn’t solve on its own: who pays for what.

Clothes, shoes, a doctor’s visit, school supplies — each expense small on its own, but adding up fast. It was never just about doing the math. It was about the feeling of having to keep track of everything, while everything else in life was being rearranged at the same time.

The first attempt was a shared spreadsheet — the simplest solution on paper, a disaster in practice. The next step seemed obvious: build something myself, with the help of AI tools. That worked up to a point, but it wasn’t particularly secure, and it wasn’t actually cheap either, once you count your own time honestly.

What made the difference in the end was timing: modern AI-assisted development made something possible that would have taken a whole team just a few years ago — that’s why twofair exists now, not sooner. And the more we talked with other parents in similar situations, the clearer it became: this isn’t a one-off case, it’s a quiet, rarely-discussed problem. That’s where the thinking behind twofair comes from — a tool for a situation nobody chooses: deliberately kept lean, deliberately affordable, without expensive marketing that users would end up paying for anyway.

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