Lexcellent

Privacy Policy

Effective date: November 4, 2026

This Privacy Policy explains how Lexcellent ("Lexcellent", "Service", "we", "us", "our"), operated by Individual Entrepreneur Anton Elizarev, Armenia, collects, uses, stores, and protects your information.

The legal bases on which we process your information are listed in section 8.

1. Information We Collect

We may collect the following information:

Account information:

  • email address;
  • password authentication data;
  • Google account information if you sign in with Google, or Apple account information if you sign in with Apple (your name, if you choose to share it, and your email address — which may be a private relay address created by Apple);
  • account settings and preferences.

Learning data:

  • uploaded texts;
  • words extracted from uploaded texts;
  • translations and linguistic analysis results;
  • words marked as known, learned, or in progress;
  • study history and card review data;
  • language settings and learning preferences.

Device and notification data:

  • device identifiers;
  • device type and platform;
  • push notification tokens;
  • notification and study interval settings;
  • device activity status related to delivering study cards.

Support data:

  • messages you send through the in-app or website feedback form, and any screenshots you choose to attach;
  • your account email, the app version and platform, and your interface and study languages, sent with that message so we can reply and reproduce the issue.

Payment-related data:

  • subscription status;
  • customer ID, subscription ID, transaction ID, and related payment metadata from Paddle, Apple (App Store In-App Purchases), Google Play, or other payment providers;
  • plan, renewal, cancellation, and refund status.

We do not collect or store full payment card numbers. Payment information is processed by the relevant payment provider.

Analytics and advertising data (see section 13):

  • cookie identifiers on the website and an app-instance identifier in the apps; on Android, the Android Advertising ID;
  • a pseudonymous Lexcellent account ID and your plan;
  • interaction events (for example sign-up, adding a source, answering cards, opening the Pro offer, purchases);
  • approximate location derived from your IP address, device and browser type, language;
  • the ad or campaign that brought you to Lexcellent (campaign tags and ad click identifiers);
  • on the website, a hashed (unreadable) form of your email address.

2. Uploaded Texts

Lexcellent stores uploaded texts internally to provide text analysis, vocabulary tracking, and study features.

Uploaded texts are not made public and are not shared with other users. Full uploaded texts are not shown to other users. The Service may display short examples from your uploaded texts for individual words, and only to the account that uploaded the relevant text.

User data is kept separate between users. One user's uploaded texts, vocabulary, and study progress are not intentionally shared with other users.

3. How We Use Information

We use your information to:

  • create and manage your account;
  • authenticate you through email/password, Google sign-in, or Sign in with Apple;
  • analyze uploaded texts into words;
  • provide translations and linguistic information;
  • create and deliver study cards;
  • remember your known, learned, and active words;
  • sync learning progress across devices;
  • send notifications and study reminders;
  • manage subscriptions and access to paid features;
  • provide support and respond to requests;
  • measure how the Service is used and how our ads perform, and show Lexcellent ads, including to people who have used the Service before (remarketing) — see section 13;
  • prevent abuse, fraud, and unauthorized access;
  • comply with legal, tax, accounting, and security obligations.

4. Translation and Linguistic Processing

Lexcellent uses linguistic tools and datasets such as Stanza, spaCy, UniMorph, Wiktionary (via Wiktextract), wordfreq, pymorphy3 and similar resources to process language data. These run on our own servers. The full list, with licences and credits, is on the Data Sources page.

Lexcellent may send words, phrases, or analysis results derived from your uploaded texts to machine-translation providers (Google Translate, DeepL) in order to provide translations.

Word pronunciation comes from recordings by native speakers (Lingua Libre and Wikimedia Commons). Where there is no recording, the word is read by an AI voice: we send only the word itself (for a noun, with its article) to Microsoft Azure AI Speech, never your text, your account details or anything that identifies you. The resulting sound is synthetic and is shared by all users who study that word.

Translations, linguistic information, word forms, pronunciation-related information, and examples may be incomplete or inaccurate. You are responsible for checking the accuracy of language information before relying on it.

5. AI and Model Training

Lexcellent does not use AI models to generate learning content, except the synthetic pronunciation of words that have no native recording (see section 4).

For some study languages (currently Italian and Ukrainian), the sentences of a text you import are sent to an AI language model — Google's Gemini API — only to analyse their words: the dictionary form of each word, its part of speech and its grammatical gender. The model returns this analysis and nothing else; it does not write cards, translations or examples. We use Google's paid API tier, under which Google does not use the submitted text to train or improve its models. Analysed words may be cached (without any link to you or your text) so the same word does not have to be analysed again.

If you use «Text from a photo» in the app, the photo you take or choose is sent to Google's Gemini API only to read the text on it. The text comes back into the import box, where you can check and edit it before importing; it is then handled like any text you paste. We do not store the photo. We use Google's paid API tier, under which Google does not use the submitted content to train or improve its models.

We do not use your uploaded texts or learning data to train AI models, and we do not allow our providers to do so.

To check and improve import quality, our team may manually submit selected imported texts and their proposed vocabulary analysis to Mistral's API. These checks may also include translation and part-of-speech corrections you submitted when adding words. We do not include your account email or account identifier in these requests. The checks help identify potential errors and do not automatically change your library. We do this on the basis of our legitimate interest in accurate imports; you can object at any time by writing to support@lexcellent.app, and we will leave your imports out of these checks.

If this changes in the future, we will update this Privacy Policy and, where required, ask for your consent.

6. Third-Party Services

We use third-party service providers to operate Lexcellent, including:

  • Supabase, for database, authentication, and backend services;
  • Render.com, for hosting and server infrastructure;
  • Google, for Google sign-in, Google Translate, the Gemini API (analysing the words of imported texts in some languages and reading the text of a photo you choose to import, see section 5), Firebase Cloud Messaging (delivery of push notifications to Android devices), Google Analytics and Google Analytics for Firebase (usage statistics of the website and the mobile apps, see section 13), and Google Ads (measuring which ads lead people to Lexcellent, see section 13);
  • DeepL, for machine translation of words and phrases from your uploaded texts;
  • Mistral, for manually requested quality checks of imported texts and vocabulary analysis (see section 5);
  • Microsoft (Azure AI Speech), for the AI voice that reads words without a native recording (it receives only the word, see section 4);
  • Cloudflare, for cookieless website visit statistics (see section 13) and for storing our encrypted database backups (see section 9);
  • Apple, for Sign in with Apple, the Apple Push Notification service (delivery of push notifications to Apple devices), and App Store In-App Purchases (subscriptions bought in the iOS app);
  • Resend, for sending transactional email (such as password recovery and feedback confirmations);
  • Telegram, for internal notifications to the Lexcellent team: the email address of a new account, and the feedback messages (with any screenshots) you send us;
  • Sentry, for error reports from our server and website (technical details of an error such as the stack trace, app version, browser and operating system — not the contents of your account, your texts, or your password);
  • Paddle, for subscription payments and billing on the website;
  • Google Play, for subscriptions bought in the Android app, when in-app purchases are available there.

These providers may process personal data as necessary to provide their services to us. Their processing is also subject to their own privacy policies and terms.

7. Payments

Payments are processed by Paddle (purchases on the website), by Apple (purchases in the iOS app through the App Store), or by Google Play (purchases in the Android app). We do not store full payment card details and never see them.

When you buy a subscription in the iOS app, the purchase is tied to your Lexcellent account by your account identifier (a random ID — not your name or email), and our server verifies the purchase with Apple. Subscriptions bought through the App Store are managed and canceled in your Apple ID settings.

We receive payment-related metadata such as customer ID, subscription ID, transaction ID, payment status, subscription status, renewal status, and refund status. We use this information to manage access to paid features.

Refunds and payment disputes may be handled by the payment provider according to its own rules and our Refund Policy.

8. Legal Bases for Processing

Where applicable data protection laws require a legal basis, we process your information based on:

  • performance of a contract, to provide the Service you request;
  • legitimate interests, to secure, maintain, and improve the Service;
  • consent, where required for optional features or communications;
  • for analytics and advertising (Google Analytics, Google Ads, enhanced conversions, remarketing): in the European Economic Area, the United Kingdom and Switzerland, your consent, which you can withdraw at any time; elsewhere, our legitimate interest in measuring and promoting the Service, to which you can object using the choices in section 13;
  • legal obligations, where we must retain or process information for tax, accounting, compliance, or legal reasons.

9. Data Retention

We keep your information while your account is active or as long as needed to provide the Service.

When you import a text, we keep the analysis of that import — the words we found, how we analysed and translated them, and the changes you made before saving (edited, marked as known or removed) — for up to 180 days, to improve the quality of text analysis and translations. It is linked to your account only and deleted with it. Imports you did not save are deleted after 3 days.

If you delete your account, we will delete or anonymize your personal data within a reasonable time, except where we need to keep certain information for legal, tax, accounting, security, fraud prevention, dispute resolution, or compliance purposes.

We keep encrypted backups of our database so that the Service can be restored after a failure. When you delete your account, your data is removed from our live systems right away; copies in backups disappear as the backups expire — daily backups after 7 days, monthly backups after at most 12 months. Backups are used only to restore the Service, never to bring back a deleted account.

10. Account Deletion and Your Rights

You may request deletion of your account and associated personal data by contacting us at support@lexcellent.app or using any account deletion tools available in the Service.

Depending on your location, you may have rights to:

  • access your personal data;
  • correct inaccurate data;
  • delete your data;
  • object to or restrict certain processing;
  • request a copy of your data;
  • withdraw consent where processing is based on consent;
  • complain to a data protection authority.

We may need to verify your identity before processing such requests.

11. International Users and Data Transfers

Lexcellent may be used by users in different countries. Your information may be processed and stored in countries other than your country of residence, including by our infrastructure and service providers.

When personal data from the European Economic Area, the United Kingdom or Switzerland is transferred to a country without an adequacy decision, we rely on the safeguards in our providers' data processing terms, such as the European Commission's Standard Contractual Clauses or, where a provider is certified, the EU-U.S. Data Privacy Framework.

For Google Ads measurement and remarketing, Google acts as an independent controller under the Google Ads Controller-Controller Data Protection Terms and is certified under the EU-U.S. Data Privacy Framework.

12. Security

We use reasonable technical and organizational measures to protect your information against unauthorized access, loss, misuse, alteration, or disclosure.

However, no online service can be guaranteed to be completely secure. You are responsible for keeping your account credentials safe.

13. Analytics and Tracking

Lexcellent uses Cloudflare Web Analytics, a cookieless, aggregate-only visit counter for the public website.

We also analyze how the Service is used — for example sign-ups, which apps and language pairs are used, imports, study activity, and feedback — using the data the Service already stores, to understand what works and to improve Lexcellent. Some of this usage information is also measured with Google Analytics and used for advertising, as described below. Selected text-based import quality checks may use the linguistic processing provider described in section 5. If you arrive through an ad or a link with campaign tags, we record which campaign or site referred you (not your browsing history).

We use Google Analytics (on the website) and Google Analytics for Firebase (in the Android and iOS apps), provided by Google Ireland Limited / Google LLC, to understand how people find and use Lexcellent and to measure our advertising (Google Ads). They collect:

  • app and website interaction events — for example opening the app, signing up and the sign-in method, adding a source and how many words it had, answering your first and later cards, opening the Pro offer, starting a checkout, a purchase, renewal or refund (plan, price and currency, transaction ID);
  • technical data — device model, operating system, app version, browser, language, approximate location (country/city derived from the IP address, which Google does not store), and an app-instance or cookie identifier;
  • which ad or campaign brought you to Lexcellent, if any;
  • a pseudonymous Lexcellent account ID and your plan (Free or Pro), so that the same account is counted once across its devices;
  • on the website, for Google Ads "enhanced conversions": your email address, hashed (SHA-256) in your browser before it is sent, so Google can match a sign-up or purchase to an ad without receiving the address in readable form. Only with consent where consent is required.

We never send your name, texts, words, or answers.

We use this data to see which features and campaigns work, to count conversions in Google Ads, and to show our ads to people who are likely to find Lexcellent useful. Third-party vendors, including Google, use cookies and app identifiers to show Lexcellent ads on sites and apps across the internet (including YouTube) based on your past visits to our website or use of our Android app (remarketing), and to build similar audiences. We use these Google Analytics Advertising Features: remarketing, Google Ads conversion measurement, enhanced conversions, and Google signals with demographics and interests reporting.

The iOS app does not use the advertising identifier (IDFA), does not show the "Allow tracking" prompt, does not track you across other companies' apps or websites, and its data is not used for remarketing — only to measure how the app is used and how our ads perform. The Android app may use the Android Advertising ID to measure which ads led to an install or sign-up and for remarketing; you can reset or delete it at any time in your phone's settings (Settings → Google → Ads).

We do not sell your personal data for money. Using advertising cookies and identifiers for remarketing may count as "sharing" for cross-context behavioral advertising under some US state laws; you can opt out at any time with the choices below, and the website honors the Global Privacy Control (GPC) signal of your browser.

Your choices:

  • In the European Economic Area, the United Kingdom, and Switzerland, analytics and advertising cookies and identifiers are used only with your consent. Until you accept, the website sends Google only cookieless signals without cookies or identifiers (Google Consent Mode), and the apps send no analytics identifiers.
  • On the website, everyone can change or withdraw their choice at any time with the "Cookie settings" link at the bottom of the page or in Settings. In the apps, use Settings → Usage statistics.
  • Opt out of personalized advertising: https://adssettings.google.com (also www.aboutads.info/choices, and https://youradchoices.ca in Canada). Opt out of Google Analytics on the web: https://tools.google.com/dlpage/gaoptout.

Google processes this data under its own terms; see https://policies.google.com/technologies/partner-sites for how Google uses data from sites and apps that use its services. Detailed analytics data is kept for 14 months; Google Ads remarketing lists keep a visitor for up to 540 days.

We use Sentry to receive reports about errors on our server and website, so we can fix problems before you have to report them. These reports contain technical details of the error only; we do not send your texts, words, passwords, or the contents of your requests, and we strip addresses of query parameters. If we add crash reporting to the mobile or desktop apps, we will update this Privacy Policy. The desktop apps contain no analytics or advertising SDKs.

14. Children

Lexcellent is not intended for children under 16.

If you are under the age of majority in your country, you may use the Service only with consent from a parent or legal guardian.

If we learn that we have collected personal data from a child in violation of applicable law, we will take reasonable steps to delete it.

15. Countries Where the Service Is Not Offered

We may restrict access to the Service in countries or regions where we are not able or not willing to provide the Service, including Russia and countries or regions subject to applicable sanctions.

16. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. If we make material changes, we will take reasonable steps to notify users, such as by posting the updated policy on our website or in the Service.

Your continued use of the Service after the updated Privacy Policy becomes effective means you accept the updated policy.

17. Contact

For support, privacy-related questions, or account deletion requests, contact us at support@lexcellent.app.

Individual Entrepreneur Anton Elizarev
Building 9/4, Apartment 1, Garegin Nzhdeh Avenue
Gyumri, Armenia
Email: support@lexcellent.app
Website: https://lexcellent.app