Free · no account · your data stays with you

Separated parents,
clear accounts,
happy kids.

You already note your children's expenses somewhere — WhatsApp, Telegram, an Excel spreadsheet, Splitwise… Co-Kids brings them together into crystal-clear accounts: who paid what, who owes how much, a signed monthly report — plus the custody calendar.

Download for free See how it works
  • Ready in 30 seconds
  • No sign-up
  • 29 languages
A mum and her son, forehead to forehead, sharing a moment on the sofa
A father focused at his desk, in front of his laptop
Co-Kids was born in a real separated family.

Why Co-Kids exists

An app born in a real separated family

I'm a dad of two, divorced, with shared custody. Like many separated parents, we noted the kids' expenses in a WhatsApp conversation: school lunch, judo, shoes, the dentist…

Over time, that conversation got complicated: impossible to know who had paid what, who owed how much to the other. Every money talk could become a source of tension.

I built Co-Kids for us — then I realised other families were going through the same thing. One non-negotiable rule from day one: my children's lives will not end up on a server. Everything runs on your device, and what syncs between parents is end-to-end encrypted.

I hope this program takes a few of the small everyday stresses off separated parents' shoulders. That's all that matters.

— Laurent, creator of Co-Kids

Three steps, not one more

You already know how to use it

No need to change your habits or convince the other parent: Co-Kids starts from what you already have — a chat, a spreadsheet, a shared expenses app… or a simple entry by hand.

1

Start from what you already have

WhatsApp or Telegram, an Excel or CSV export, a copy-paste, or expenses already logged in Splitwise or Tricount: Co-Kids can read it all.

2

Import in one move

Drop the file or paste the text into the app. Every expense is recognised — amount, currency, child, date — and re-importing never creates a duplicate.

3

Or enter it by hand

Nothing to import? Add an expense in two seconds in Co-Kids. Either way, the balance, the breakdown per child and the monthly report all work themselves out.

The app

Everything you need, nothing more

A parent and their child looking at the phone together
The balance: 69.6% Camille, Julien owes 119.68 € to Camille
FREE

The balance, in black and white

Who paid what, who owes how much to the other, according to the split you agreed on (50/50 or otherwise). The monthly report can be printed and exported, ends with a signature block — and there is even a special mediator report, with and without disputed expenses.

A parent checking the custody calendar on their computer
The custody calendar: each parent's weeks in colour
FREE

The custody calendar, finally readable

Alternating weeks, 2-2-3, alternating weekends or a custom rhythm: the calendar colours in each parent's days. One click to swap a day, set holidays, note an appointment. The split of days is calculated automatically.

A parent filing documents from the sofa
The kids' documents organised in folders
FREE

The kids' documents, all in one place

ID card, health record, permission slips, receipts filed by month. Your documents stay on your device — and if you go Premium, each parent uploads to their own space and both can view everything.

Two separated parents, each at home, with their data syncing
The Co-Kids monthly report, approved by both parents
PREMIUM

Together, everything syncs

The calendar becomes THE same calendar for both parents: one proposes a day swap, the other accepts, everything is tracked. The kids' documents and expense receipts are shared between the two households, end-to-end encrypted. Disagreements are settled in the app, every decision is dated. And each month, each parent clicks “I approve this report”: the balance becomes indisputable.

And also

Everything Co-Kids can do, now explained

The home page showed the balance, the calendar, documents and syncing. Here's what has been built since — every new feature has its own page.

↦

Import from anywhere

WhatsApp, Telegram, Messenger, Excel/CSV, bank statements, Splitwise, Tricount… brought in without ever a duplicate. See the Import page →

⌂

Blended families

Children with several co-parents? One household each, a one-tap switch, a summary view, an “all my children” calendar. Find out more →

📅

A full custody calendar

Alternating weeks, 2-2-3, weekends, free rhythm; negotiated swaps, holidays, events and reminders. See the Calendar page →

💬

Talk to each other under every piece of information

A social-media-style comment thread under every event and every custody swap — signed, time-stamped, encrypted, with a new-message alert.

⟳

Always up to date

Co-Kids quietly checks for new versions at startup and lets you know — you stay in control. No data sent: only a version number is read.

🌍

29 languages, offline, no account

Everything works on your device, even with no connection, in 29 languages including Arabic and Hebrew.

Privacy

The one thing we don't negotiate

Co-Kids was born from a refusal: to put a family's life on a server.

“We cannot read your data. That's not a promise, it's a technical impossibility.”

The free app runs entirely on your device, no account needed. Your expenses and your WhatsApp conversation are never sent anywhere. The Premium option adds syncing between the two parents: your data then passes through our server, but end-to-end encrypted, on your device, before it leaves — we store bytes we are unable to read.

Read our Privacy page — the full details, no jargon →

Pricing

Free forever. Premium if you sync.

Why 3 € a month, when everything else is free? Because syncing is the only feature that costs us money: a server carries and hosts your encrypted data between your two households, 24/7. Premium pays for that server — nothing else. No advertising on your data (we can't even read it), no reselling, no watered-down free version.

Co-Kids

0 €
forever, no account
  • WhatsApp import, balance, monthly reports
  • Per-child breakdown, multiple currencies
  • Full custody calendar on your device
  • Kids' documents on your device
  • Printing, CSV exports, backup
  • 29 languages, no advertising on your data
Download for free
The most complete

Co-Kids Premium

3 €/month
per household, billed 18 € every six months — the other parent pays nothing
15-day free trial, no bank card
  • One single calendar, always up to date for both
  • Disagreements settled in the app, dated decisions
  • Monthly report electronically approved by both
  • Shared documents and expense receipts, end-to-end encrypted
  • 200 Mo of encrypted storage included (Espace+: +500 Mo for 2 €/month, billed 12 €/half-year)
Start the free trial

Multi-platform

Wherever you are

Available today

On computer, tablet and phone

Co-Kids opens in your browser and installs in one tap — on PC and Mac as well as mobile, with no app store. It then works even offline.

  • 💻 Computer (Chrome / Edge) — installable
  • 📱 Android (Chrome) — installable
  • 🍎 iPhone / iPad (Safari) — on the home screen

How to install it →Solo parent

Coming soon

Dedicated apps & software

We're preparing mobile apps — Android first, on the Play Store — and desktop software for computers. In the meantime, the installable version already offers all of Co-Kids.

  • ▶️ Android · Play Store — in preparation
  • 🖥️ Desktop software (PC/Mac) — in preparation
  • 📱 Other mobiles — coming later

Let's go

Download Co-Kids — it's free

Co-Kids is a simple file that opens in your browser — computer, tablet or phone. No installation, no account, no app store.

Download Co-Kids for free

Once downloaded, the app works even without internet — and your data stays on your device.