Privacy Policy

Last updated: March 2026

This Privacy Policy explains how Lexum collects, uses, and protects information when you use the Lexum website and the Lexum mobile application (together, the “Service”).

1) Website (lexum.app)

The landing website does not require an account. We collect personal data only when you submit it (for example, when joining the waitlist). We also use analytics to understand how the website is used.

What we collect on the website

• Waitlist form: email address, your learning language (optional), and platform preference
• Website analytics: page views and basic technical data (browser, device type, IP-derived approximate location)
• Performance: aggregated performance metrics (e.g. page speed)

Cookies & consent

Google Analytics is loaded only after you press “Accept” in our cookie banner. If you press “Reject”, we do not load Google Analytics and no analytics cookies are set. You can revisit your choice via the Cookies link in the footer.

2) Mobile application

The Lexum mobile application is designed to help users translate, save, and practice vocabulary. When you use the app, we process additional information necessary to provide the service.

Information we collect in the app

• Account information: email address and authentication identifiers
• Learning data: saved words, vocabulary lists, and learning progress
• Usage data: feature usage and interaction events (to improve the product)
• Device information: device model, operating system, app version, language/region settings
• Notifications: push notification token (if you enable reminders)
• Diagnostics: crash reports and performance data to keep the app stable

How we use the data

• Provide translation and vocabulary learning features
• Save learning progress and synchronize across devices
• Send learning reminders and notifications (if enabled)
• Improve product experience and reliability
• Maintain security and prevent abuse

Third-party services

Lexum relies on trusted infrastructure providers to operate the Service. These services may process limited data required to provide their functionality.

• Supabase — authentication and database
• PostHog — product analytics
• Sentry — crash and error reporting
• DeepL — translation processing
• Anthropic — AI language processing
• RevenueCat — subscription management
• Google Analytics — website analytics (only after consent)
• Vercel — website hosting and performance insights

Security

All communication with the Service is encrypted via HTTPS. We apply reasonable technical and organizational measures to protect information from unauthorized access or misuse.

Data retention

We keep data only as long as necessary to provide the Service:

• Waitlist data: until launch and for a reasonable period afterwards, or until you request deletion
• App data: while your account is active, and as needed for backups, security, and legal obligations
• Analytics/diagnostics: according to the settings of the respective providers

Account deletion

You can request deletion of your Lexum account and associated data by contacting us.

Children

Lexum is intended for general audiences and is not specifically directed toward children under 13. We do not knowingly collect personal information from children under 13.

Your rights (EU/EEA)

If you are in the EU/EEA, you may request access, correction, deletion, restriction, or portability of your personal data, and you may object to processing in certain cases. You also have the right to lodge a complaint with your local data protection authority.

Contact

To request deletion or ask a privacy question, contact: