What we collect
Anonymous Firebase account
When you first use Stickly, Firebase may create an anonymous account so we can save your vocabulary and preferences before you sign in.
Account sync
If you later create or link a permanent account, your saved words, review progress, and preferences can sync across the devices where you use Stickly.
Browsing and translation
Stickly can run on websites you allow. On those pages, the extension reads page content locally in your browser so it can detect selected text, highlight saved words, and show inline review. When you ask Stickly to translate or save a word, we send that text and the minimum surrounding context needed to process the request and store the result.
Saved data
We store saved vocabulary, translations, optional context sentences, review progress, and your learning preferences in Firebase.
Analytics and product events
Only when you allow optional analytics, we use a pseudonymous installation ID from the browser extension, when available, together with product events to understand how Stickly is used and to keep app and extension events aligned to the same installation. Anonymous Firebase accounts are not used as analytics user IDs. If you sign in, some analytics events may be associated with your account.
AI Practice
Guest Practice messages and feedback are sent to our configured AI provider to generate the conversation and feedback. Guest content expires after one hour and is deleted from Stickly within 24 hours unless you choose account continuation. If you continue with an account, the session and review are retained until you reset Practice data or delete your account. Stickly requests that provider responses are not stored for product use, but the provider may retain limited processing data for abuse monitoring under its own policies. “Deleted from Stickly” describes Stickly's storage and does not mean deleted everywhere.
We do not record Practice messages, translations, self-corrections, or feedback text in product analytics or session replay. AI suggestions are candidates for you to evaluate; they do not verify themselves and Practice never changes your spaced-repetition schedule automatically.
Sharing and advertising
We do not use your data for advertising, and we do not sell it or share it with unrelated companies for cross-company tracking.
Deletion and contact
You can delete your account from Stickly settings. Deleting your account removes the data stored for that account from our product database. For privacy questions or deletion requests, contact alexander@stick.ly.