koosly

Privacy

Last updated 6 October 2026.

Who uses Koosly

Koosly is a planning app for a family: a couple, parents and children, grandparents who help, a nanny, flat-mates. Each family in Koosly is its own private space, and you can be in more than one. The people in a family are adults, children and helpers. Adults sign in and see everything in the family. Children can sign in too and see their own part of it. Helpers don’t sign in: an adult gives them a calendar link with only what involves them.

Who can see what

  • Adults see and change everything in the family: the sync, actions, decisions, trips, plans, places, projects, the house and settings.
  • Children see their chores, the shopping list, and what is happening in the family that concerns them: who is away and when, who comes to the house, the outings and holidays they are part of. They don’t see the sync, actions, decisions, bookings, visit notes or settings, and no one’s email address.
  • Helpers get a calendar link showing the days they help, the children’s schedule and the visits they let in, with the visitor’s phone but never the notes.
  • Nobody outside the family sees any of it, and the people in your other families can’t see this one.

Visits and notes

A visit (the cleaner, a plumber, a babysitter) can carry notes: a door code, where the key is. Every adult in the family can read them, and so can an AI assistant an adult has connected, when that adult asks for them. They never go into calendars, emails, or to children or helpers.

What it stores

  • Your name and the email address you sign in with (Google, or a code sent to your email).
  • What you add to a family: its name, topics, actions, decisions, sync summaries, trips, plans, places, projects, pets and care, chores, visits and their notes, the shopping list, and settings.
  • Each person’s role in the family (adult, child or helper), their home base, time zone and whether they drive.
  • Invitations. When you invite someone by email, their address is stored with the invitation until it’s used. An invitation link works once, expires after 14 days, and when it was sent to an address, only that address can take it.
  • Emails you forward or label into Koosly: their subject, a short snippet and a link back to the message.
  • If you connect a travel calendar, its address. That address is a secret (anyone holding it can read the whole calendar), so only you and Koosly’s server ever see it; the family sees that a calendar is connected. What is in the calendar is read to show travel and kept for up to 15 minutes, never saved.
  • If you connect Google Calendar, a token that lets Koosly manage the calendars it creates for you, stored encrypted.
  • If an adult connects an AI assistant, a record of which one, who connected it and when.

AI assistants

An adult can connect an AI assistant (Claude, ChatGPT or another app that speaks MCP) to a family. From then on, whatever that adult asks it, the assistant reads and changes the family’s data as that adult, and the company behind the assistant receives whatever it reads. Koosly itself sends nothing to any AI service on its own. Every adult in the family sees which assistants are connected and by whom under Settings → AI assistants, and is told by email when someone connects one; each person disconnects their own. Children and helpers can’t connect one.

Email

When the person running Koosly has set up email, Koosly sends an invitation when you invite someone, a note when the person you invited joins, a note when you are removed from a family, and a note to the other adults when one of you connects an AI assistant. Otherwise nothing is emailed and the person inviting you shares the link themselves. Koosly sends no newsletters or marketing.

Google Calendar

With your permission Koosly creates a calendar in your Google account for each family you connect, named after the family, and keeps it up to date with your syncs, plans and trips. It uses Google’s narrowest calendar permission, which only covers calendars the app created: Koosly cannot see or change any other calendar or anything in one. You can disconnect in Settings or at myaccount.google.com/permissions at any time.

A family also has a calendar address to subscribe to, and each helper their own. Anyone with that address can read the calendar behind it, so share it only with people in the family; when someone leaves or is removed, the address changes.

Your mail

If you connect your own mailboxes (Outlook, iCloud, Gmail or another), Koosly reads your inbox only, read-only, and shows you alone what is worth a look. It keeps the sender, the subject, the time and a short preview of each message for 30 days, never the whole message or its attachments, and nobody else in your family, nor any assistant, can see them. Nothing from your mail is shared until you tap Add, and then only what you added. Disconnecting in Settings deletes the access and every preview at once.

For iCloud, Gmail and most other providers, Koosly is given an app password. That password is stored encrypted and Koosly only ever reads with it, but in other hands it could read and send as you, so make one just for Koosly and revoke it where you made it (appleid.apple.com, myaccount.google.com/apppasswords, or your provider’s security settings) when you stop using Koosly. Outlook uses a Microsoft sign-in limited to reading mail, which you can revoke at account.microsoft.com.

Who is responsible, and where it lives

Koosly is software a household runs for itself; there is no company behind it holding your data. The person who runs this copy of Koosly is responsible for the data; for koosly.com that is the household that runs it. To ask about your data, ask that person: in a family you joined, that is usually whoever started it.

These services do work for a copy of Koosly:

  • Supabase keeps the database, in Frankfurt (EU).
  • Vercel runs the app and serves the pages.
  • Resend delivers the few emails Koosly sends (invitations, a note when someone joins, is removed or connects an assistant), when the person running the copy has set it up.
  • Postmark receives email forwarded to a family’s Koosly address, when that is set up.
  • Google signs you in, and holds the Koosly calendar when you connect Google Calendar, or your mail when you connect Gmail.
  • Microsoft holds your mail when you connect Outlook.

Nothing is sold, shared or used for advertising, and no analytics or tracking is used.

A copy of your data

Any adult can download the family’s data as one file at any time: Download this family’s data. It holds everything the family has added, each person’s name, role and sign-in address, your own travel calendar address, and the family’s calendar address. It does not hold anyone’s mail, which is each person’s own under Mail, or anyone else’s travel calendar address.

Leaving, and removing your data

  • Delete anything in a family from the app.
  • Leave a family in Settings, under Your family. Your connected assistants, calendar links and Google Calendar connection for that family stop at once. Your name stays on what already happened (“Done by Anna”) until an adult erases your profile there; nothing else of yours stays. When the last person leaves, the family and everything in it is deleted.
  • An adult can remove someone from the family, and erase them: erasing deletes their name and details from everything, including the past.
  • Delete a whole family in Settings, under Your family. Everything in it is removed, for everyone in it.
  • Disconnect Google Calendar and your mailboxes in Settings, and delete the Gmail script from script.google.com if you installed it.
  • Your sign-in record (your email address and sign-in id) stays until the person who runs this copy of Koosly deletes it; ask them. Koosly will offer this in Settings itself in a later version.