Napkin Numbers

Privacy Policy

Last updated: 18 August 2026

Napkin Numbers ("the app," "we," "us") is a daily estimation puzzle game. This policy explains what information the app collects, how it's used, and the choices you have. We've tried to keep it short and in plain language.

1Information We Collect

Automatically, for everyone:

• An anonymous device identifier, created the first time you open the app, used to track your streaks and puzzle results. This identifier is not linked to your name or contact details unless you choose to sign in (see below).
• Gameplay data — your guesses, scores, and streaks for each daily puzzle.

Only if you choose to sign in with Google or Apple:

• Your name and email address, as provided by Google or Apple, so your progress can be recovered if you switch devices. Signing in is entirely optional — the app is fully playable without it.

2How We Use This Information

• To run the core game: score your guesses, track streaks, and show how your result compares to other players that day.
• To let you recover your progress if you sign in and switch devices.
• Comparisons shown to other players (e.g. the daily results chart) use only aggregated, anonymous statistics — your individual guesses are never shown alongside your name to other players.

3Where Your Data Is Stored

Data is stored using Google's Firebase platform (Firestore for gameplay data, Firebase Authentication for sign-in). If you sign in with Google or Apple, that authentication is handled directly by Google or Apple's own sign-in systems — we never see or store your password.

4Data Sharing

We do not sell your data. We do not share it with third parties for marketing or advertising purposes. Data is only accessible to the services listed above (Google/Firebase infrastructure) as needed to run the app.

5Data Retention & Deletion

Your data is retained for as long as you use the app. If you'd like your account and associated data deleted, email troydmcleod@gmail.com with your request and we'll remove it.

6Children's Privacy

Napkin Numbers is a general-audience trivia/puzzle game and is not directed at children under 13. We do not knowingly collect personal information from children under 13.

7Changes to This Policy

If this policy changes — for example, if we introduce advertising in the future — we'll update this page and revise the "last updated" date above.