How Offset looks after your family's information

Who runs it

Offset is a small, invite only pilot run by Ben Jeffreys, a parent, for a few families at the same school. It is not a company product. Ben is responsible for your family's information while you use it. To ask anything, or to have your data deleted, ask Ben directly, or use "Delete our family's data" on your parents' page.

What it keeps

• A parent's email address, used only to send you your family's links and important messages about Offset (never marketing). Emails are sent through Resend, an email delivery company.
• Your family name, and a parents' password and each child's PIN (stored only in scrambled form, so nobody can read them back).
• Each child's first name, year group and Satchel One student number.
• The homework and tests Satchel One shows for your children, including the teacher's descriptions and attached files (files are deleted once the app has written up the task).
• What each child does in Offset: cards practised, quiz scores, lessons opened, time spent, and the conversations they have with the coach.
• How much each child uses Claude, so the cost can be seen.
• Simple counts of how the apps are used: which day and hour each one was opened, what was done (a bite, a quiz, a lesson, a coach question), and on what kind of device (phone, tablet or computer, and whether from the home screen icon). This is counted inside Offset to see whether it is helping; there are no outside analytics or advertising trackers, and no cookies.

It does not keep your Satchel One password, and never asks for it.

How homework gets in

You add the Offset sync extension to your own Chrome or Edge browser. While you are signed in to Satchel One in that browser, the extension reads your children's to do lists and task pages there and sends them to Offset. Your Satchel One sign in stays in your browser. The extension only reads: it never ticks anything on Satchel One, never starts or submits quizzes or work, never changes settings and never sends messages. You can disconnect it at any time.

Offset is not made by, endorsed by or connected with Satchel One. Satchel One's terms of use do not mention tools like this one, which read your own children's information through your own sign in, either to allow them or to forbid them. Offset keeps the risk low: it uses only your own sign in, never shares a login, only reads, and visits Satchel One about once a day. Even so, Satchel One could decide it does not want this, and the realistic worst case is that it limits or suspends your Satchel One account. If that happened, or if you were asked to stop, you would disconnect the extension and Offset would stop receiving new homework.

Claude, the AI

Offset uses Claude, an AI made by Anthropic, to write revision lessons and quizzes, to write up new homework from the teacher's material, and as a study coach. To do this, the relevant schoolwork (and, for the coach, what your child types) is sent to Anthropic's service. Under Anthropic's commercial terms, this information is not used to train its models. The children are told on the Coach screen that the coach is an AI and that parents can read the conversations. The coach gives hints and examples, not answers to set homework, and is told to steer back to schoolwork and to point a child who seems upset towards a trusted adult and Childline.

Where it is kept, and who can see it

Everything is stored with Netlify, the hosting company Offset runs on, whose servers may be outside the UK. Each family's information is kept separately. Your children can see only their own work; you can see your whole family's from the parents' page. Ben can see, for each family, when it last synced, how much Claude it used, and the usage counts above for each child and the parents (such as how many days this week, and whether on a phone), so he can keep the pilot running, see whether it is working, and keep its costs in check. He does not look through children's work or conversations. If anyone in your family reports a card, quiz question or lesson as wrong, you and Ben both see that item (the revision content, not anything your child wrote) so the cause can be found and fixed.

How long, and deleting it

Your family's information is kept while you use Offset. You can delete all of it at any time with "Delete our family's data" on your parents' page: this removes everything straight away and cannot be undone. If you stop using Offset, ask Ben and he will delete it for you. Your children can ask you or Ben to see or delete their information too.