Privacy

What stays on your device

Profiles (names, levels, settings), the words each person is learning, favorites, collections and your own words are stored in your browser's storage on each device. You can download a backup or erase it all from Settings.

Family sync

Sync is off until a parent turns it on. When it's on, your devices share a six-word family code. The code never leaves your devices. From it, your device creates an encryption key and scrambles every item before uploading. Our server, run on Cloudflare, stores only these encrypted items, a scrambled family identifier, and the time each item changed. We cannot see names, words or progress, and we can't recover your code. Anyone who has the code can join your family, so keep it private.

If you stop syncing on every device, encrypted items left on the server can't be read by anyone. Contact us to have them deleted sooner.

What we don't do

We don't use analytics, ads, cookies, tracking pixels or third-party scripts. Fonts and all other files are served from this site. Like any website, our hosting provider (Cloudflare) handles basic connection data, such as IP addresses, to deliver the site and protect it from abuse. We don't keep logs of this ourselves.

Children

Lumin Vocab is designed for families, with parents setting up kids' profiles. We don't collect personal information from children. Names and progress stay on your devices, and anything synced is encrypted so we can't read it.

Read aloud

Read aloud uses the voices built into your device and browser. Some browsers may use their maker's online voice service; that's between you and your browser.

Contact

Lumin Vocab is made by B7 Collective LLC. Questions: hello@b7collective.com. The source code is public at github.com/B7Collective/lumin-vocab, so you can check all of this yourself.

Last updated November 9, 2026.