Privacy policy

Last updated November 10, 2026

Ten4 is a task manager that works with your AI assistant. Anyone can sign up with an email address, and it is currently in beta. This page says what Ten4 stores, who else handles it, and how to have it removed.

What Ten4 stores

• Your account: your name and email address.
• Your work: the projects, tasks, notes, descriptions, drafts, checklists and locations you or your AI assistant add. A location is whatever name, address, phone number and website you or your assistant supply.
• Sign-in: a six-digit code is emailed to you to sign in. Only a hash of it is stored, it expires quickly and it works once. Access tokens issued to the AI assistants you connect are also stored only as hashes.
• Google Calendar, if you connect it: a refresh token that lets Ten4 read the calendars you choose to show and create the time blocks you ask for. Ten4 doesn't keep a copy of your events; it reads them when a page is shown or you ask your assistant.
• Kindle delivery, if it's set up: the morning edition your assistant writes, and the address it's emailed to.
• Your time zone, so that “today” means your today.
• Server logs of requests (what was called and whether it worked) for diagnosing problems.

Cookies

Ten4 sets two cookies: one to keep you signed in and one that remembers your time zone. There are no advertising or analytics cookies and no third-party trackers.

Who else handles your data

Ten4 runs on a few services, each of which handles only what its job needs:

• Vercel hosts the app.
• Neon hosts the database where the data above is stored.
• Resend sends the emails: sign-in codes and Kindle editions.
• Google, if you connect Calendar. A task's location map is a Google Maps embed, which receives the place's name and address when you open that task.
• The AI assistant you connect (for example Claude). Ten4 is built to be used through one. What you say to it, and what Ten4 returns to it, is handled under that provider's own terms and privacy policy. Ten4 itself never calls an AI model.

Your data isn't sold, rented or used for advertising.

Google user data

If you connect Google Calendar, Ten4 uses that access only to show your events on the On deck page, to find open time, and to create the time blocks you ask for. It does not use Google user data for advertising, doesn't sell it, doesn't let people read it other than you, and doesn't use it to train AI models. Ten4's use of information received from Google APIs follows the Google API Services User Data Policy, including its Limited Use requirements.

Keeping and deleting it

Your tasks and notes stay until you delete them; deleting a task removes its notes and drafts with it. To stop Ten4's access to Google, remove it at myaccount.google.com/permissions. To have your account and everything under it deleted, or to ask what is stored about you, contact the person who runs this Ten4 deployment.

Children

Ten4 isn't meant for children under 13 and doesn't knowingly hold their information.

Terms

Using Ten4 is also subject to its terms of service.

Changes

If this changes in a way that matters, the date at the top will change with it.