Privacy policy
Last updated: September 23, 2026
Zero to Hero is a free app for study trails, run by battoni.dev. This page explains what we store, who can see it and how to have it deleted.
What we store
When you sign in with Google or GitHub we receive your name, email address and profile picture. Your profile: username, display name and language. What you create: trails, phases, milestones, completion dates, time spent and evidence (links, notes and the files you upload). Social activity: friendships, the trails you follow and the cheers you give.
Who can see it
Private trails are visible only to you. Friends-only trails are visible to your friends. Public trails, your username, display name and profile picture are visible to anyone signed in to the app. Your email address is never shown to other people.
Services we use
Supabase stores the database, the sign-in and the uploaded files. Vercel hosts the app. Google and GitHub handle sign-in. We do not sell your data, show ads or use analytics or tracking tools.
Cookies
We use only the cookies the app needs to work: one keeps you signed in and one remembers your language.
How long we keep it
Your data stays while your account exists. Deleting a trail removes it and its uploaded files. To delete your account and everything in it, email guilherme@battoni.dev; we do it within 30 days.
Your rights
Under the LGPD and the GDPR you can ask for a copy of your data, a correction, or its deletion. Email guilherme@battoni.dev and we answer within 15 days.
Questions or requests: guilherme@battoni.dev