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Privacy

What this extension holds, where it holds it, and what leaves your machine. Last updated 25 August 2026.

The short version

With no account and no optional feature switched on, nothing leaves your browser. There is no analytics, no telemetry, no crash reporting, and no server of ours involved at all.

What is stored on your machine

• Which words you have met, and how well you know each one.
• A log of what you did with each word: read, or looked up, and when.
• Daily counts, and per-site totals of how many words appeared where.
• Your settings.
• Any API keys you paste. These stay on the machine you typed them into.

Reading history is sensitive, so the stored shape is deliberately narrow. The extension records the hostname a word was met on. It does not record page addresses, page titles, or the text of any page you visit.

If you create an account

An account is optional and off unless you make one. It exists so your progress reaches your other browsers. When you have one, these are copied to the server:

• The log of words read and looked up, with timestamps and hostnames.
• Which words are in your deck.
• Your settings, with API keys removed before sending.
• Your email address, which is how you sign in.

Your data is readable only by your own account. This is enforced by the database rather than by the application: every row is tied to a user id and every policy checks it.

The server is Supabase, acting as a data processor. Nothing is sold, shared, or used for advertising. Nothing is used to train anything.

Deleting it

In the extension, open Progress, then Settings, then Your account, then Delete. This removes your account and everything attached to it. It cannot be undone, and it does not need to go through us.

To remove what is on your machine, use Reset in the same settings page, or uninstall the extension.

The two optional features that send text

Sentence translation

Off by default. When you turn it on and press the button, the sentence you asked about is sent to DeepL with your own key. It obeys the same blocked-site list as everything else. Translations are cached, so a sentence is sent once.

Asking a model

Off by default. When you turn it on, the word and the sentence it appeared in are sent to whichever provider you chose, with your own key. Requests go straight from your browser to that provider. Answers are cached.

Both send data to companies with their own privacy terms, which apply to what you send them. Neither is needed for the extension to work.

Children

This is not directed at children under 13, and accounts are not knowingly created for them.

Changes

If what is collected ever changes, this page changes with it and the date above moves. Material changes will be noted in the extension's release notes.

Contact

Questions, or a request about your data, go to [email protected].