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Privacy Policy

Last updated: August 15, 2026

What we collect

Anonymous session data. On first visit we create an anonymous Supabase Auth session so you can play without signing up. This session is stored in your browser's local storage.

Game data. Your chosen display name, avatar seed, answers, and guesses are stored in our database for the duration of a game session and then retained for game history.

Account data (optional). If you sign in with Google or email, we store your name and email address via Supabase Auth to persist your identity across sessions.

Payment data. If you subscribe to Premium, payments are processed by Stripe. We only store your Stripe customer ID and subscription status — we never see or store your card details.

Usage analytics. We may use anonymous, aggregated analytics (page views, feature usage) to improve the game. No personally identifiable information is included.

Advertising. Free-tier pages carry ads served by Google AdSense, which sets cookies in your browser. See the section below for what that involves and how to turn personalised ads off.

Cookies and advertising

We use local storage to keep you signed in and to remember your interface language. These are essential to the game working and are not used for tracking.

Third-party vendors, including Google, use cookies to serve ads based on your prior visits to this website or other websites.

Google's use of advertising cookies enables it and its partners to serve ads to you based on your visit to this site and/or other sites on the internet.

You may opt out of personalised advertising by visiting Google Ads Settings. You can also opt out of a third-party vendor's use of cookies for personalised advertising at aboutads.info, or block cookies entirely in your browser settings — the game will still work.

For visitors in the European Economic Area, the United Kingdom, and Switzerland, we rely on Google's consent management to collect and record consent for advertising cookies, and you can change your choice at any time from the link it provides. A Premium subscription removes ads altogether, for you and for everyone in rooms you host.

How we use it

  • To run the game and synchronize state between players in real time
  • To authenticate you and remember your preferences
  • To process and manage Premium subscriptions
  • To improve the game based on aggregated usage patterns

Third-party services

Supabase — database, authentication, and real-time infrastructure. Data is stored in their EU/US data centers depending on project region.

Stripe — payment processing for Premium subscriptions.

Google AdSense — advertising on the free tier. Google acts as a third-party vendor and uses cookies to serve ads; see the section below.

Vercel — hosting and CDN for the web application.

Data retention & deletion

Anonymous sessions and associated game data may be retained indefinitely for game history. If you create an account, you can request deletion of your data at any time by emailing ahmad.aboud2002@gmail.com. We will remove your account and associated personal data within 30 days.

Children

Doppelgänger is not directed at children under 13. We do not knowingly collect personal information from children under 13. If you believe a child has provided us personal data, please contact us and we will delete it promptly.

Contact

Questions about this policy? ahmad.aboud2002@gmail.com