mestri.app

Privacy

Updated October 24, 2026

This is a translation for your convenience. If it differs from the versión en español, the Spanish version governs.

The short version

This site uses no cookies and has no analytics or ads. We only know about you if you join the interest list or write to us.

The demo

The demo on the home page runs entirely in your browser, with fictional people and data. It stores nothing and sends nothing you tap. To draw the illustrated avatars it loads a library from jsDelivr (cdn.jsdelivr.net).

Where the site lives

The site is served by Vercel. Like any web server, Vercel may log technical data about each visit, such as the IP address and the browser, to run and protect the service.

The interest list

If you sign up so we can let you know when Mestri opens, we keep your email, what describes you (family, instructor, academy or sports club), the button you signed up from, the page's language and the date. We keep it in a Lexama Labs database at Neon, a database service with servers in the United States.

We use it to confirm your signup, to let you know when Mestri opens in Puerto Rico and, if you teach or run an academy or a club, to tell you how to get started. Those emails are sent by Resend, an email delivery service with servers in the United States: we pass it your email, what describes you, the button you signed up from and the language, and Resend keeps whether you unsubscribed. We don't sell it or give it to anyone else. We keep it until one year after Mestri opens, or until you ask us to delete it: every email we send you has a link to unsubscribe, and you can also write to us at hola@mestri.app.

The list is for adults. If you're a minor, ask a parent or guardian to sign up.

If you write to us

Emails to hola@mestri.app go through ImprovMX, which forwards them to our inbox. We use your email only to answer you and don't give it to anyone.

The app

When the Mestri app is available, it will have its own privacy policy, published here before launch.

Questions? Write to us at hola@mestri.app. Mestri is a Lexama Labs product, in Puerto Rico.