Privacy Policy

Composerdle · last updated 25 July 2026

Composerdle is a daily classical-music guessing game. There are no accounts, no passwords, no advertising, and no third-party analytics or tracking of any kind.

What is stored

• A random device identifier. The first time you play, your device generates a random identifier (a UUID) and keeps it locally. It is not derived from your device, your hardware, or anything about you, and it is never linked to an email address or a real name.
• Your stage name, if you choose one. This is optional and public — it is how you appear on the leaderboard. Do not use your real name if you would rather not be identified.
• Your game results: puzzles played, wins, points, streaks, and the spread of how many tries you took.

That is the complete list. No email address, no phone number, no location, no contacts, no photos, no advertising identifier, and no behavioural profile.

How it is used

Only to run the game: to keep your scores and streak across sessions, to show the leaderboard, and to stop the same daily puzzle being replayed for points. Your data is never sold, rented, or shared with advertisers, data brokers, or any other third party.

Where it is stored

Game data is held on Cloudflare R2 storage, keyed by the random identifier above. The website is served by Vercel, which processes ordinary web-server request logs on our behalf. Neither is given your data for their own purposes.

Deleting your data

You can erase everything at any time, with no request and no waiting period:

• On the web: use the delete my data link beside your stage name.
• In the iOS app: Profile → Delete my data.

This permanently removes your stored profile — name, scores, streak and history — and clears the identifier from your device. It cannot be undone, and there is no backup copy to restore.

Other players' names

Stage names are chosen by players and shown publicly on the leaderboard. Objectionable names are filtered when they are set, and every leaderboard entry can be reported or hidden. Reports are reviewed within 24 hours and objectionable names are withdrawn.

Children

Composerdle is suitable for all ages and collects nothing that could identify a child. There is no chat, no messaging, no user-uploaded media, and no way for players to contact each other.

Recordings and scores

Every recording and every page of sheet music in the game is public-domain or Creative Commons licensed, with the performer and licence named on the credits page.

Contact

Questions about privacy, or a name you would like reviewed: composerdle@andypandy.org.