Privacy policy
Last updated 20 October 2026
This policy covers Vinod Vocab Vault AI: the website, the Android app and the Chrome extension (together, “Vocab Vault”). Vocab Vault helps you learn English words: look a word up, save it, and review it. We collect only what that needs, we never sell your data, and there are no ads or trackers.
What we store
- Your account: your email address and a sign-in token, so your vault syncs between devices. Passwords are handled by Google Firebase Authentication; we never see or store them.
- Your vault: the words you save, their meanings, any note you add, and your review answers (for spaced repetition).
- Where you met a word: when you save a word, the sentence around it and, in the Chrome extension, the address of the page it was on, so you can see it again and practise with it.
- Shared libraries you create or join, and the name you choose to show on them.
This data is stored in Google Cloud Firestore in your own account space, which only you can read. If you don't sign in, it stays on your device (browser storage or the app's local database) and is not sent to us.
What the Chrome extension reads on web pages
The extension only reads a page when you ask it to: when you double-click or select a word, or use its menu or shortcut. It then reads the selected text and the sentence around it. It does not record your browsing, does not read pages in the background, and does not collect form data. To underline words you have already saved, it compares the page's text with your saved words on your own computer; nothing about the page is sent anywhere.
Services that receive a word
To find a meaning, the word you look up (only the word) is sent to these services:
- Free Dictionary API (dictionaryapi.dev) and Datamuse, for definitions;
- Google Translate and MyMemory, for the Hindi meaning;
- Pollinations (text.pollinations.ai), an AI service, for meanings, memory tricks and word origins;
- our shared Firestore word cache, so a word is looked up only once for everyone (it holds meanings, not who looked them up).
AI practice features send only what they need: “Use it” sends the word and the sentence you wrote, the reading assistant sends a list of words from the text (not the text), and “Ask Vinod” sends your question. Voice input and text recognition in the Android app run on your phone.
What we don't do
- We don't sell or rent your data, or share it for advertising.
- We don't use your data for credit, lending or anything unrelated to learning words.
- We don't use analytics or advertising trackers.
Your choices
- Remove any word from your vault at any time; it is removed on all your devices.
- Export your words (CSV, Anki or PDF) from the website or the app.
- Deactivate your account from the website or the app; your data is kept and you can reactivate it.
- To delete your account and all its data permanently, open a request at our GitHub issues page. Don't post private details there; we will reply and delete the account within 30 days.
- In the Chrome extension, turn it off on any site, and turn off underlining, in its settings.
Security
Data travels over HTTPS. Firestore security rules let each account read and write only its own vault. Shared libraries can be changed only by the account that created them.
Children
Vocab Vault is meant for learners aged 13 and over and does not knowingly collect data from younger children.
Changes and contact
If this policy changes, we will update the date at the top of this page. Questions: github.com/AnkushDhimanVashist/Vocabulary-Vault/issues.