Privacy

BlindfoldCubing.com is a free BLD memory trainer.

What stays on your device

Training sessions, ratings, and stats are stored in your browser (localStorage, keys prefixed bld_trainer_). You can export CSV or clear them in the app. Drills work after the first load without an account.

Optional account

If you sign in, authentication (and optional cloud sync) uses Firebase. That is the only time training data can leave the browser for our backend.

Analytics

The site uses Google Analytics 4 (measurement ID G-0S54NJRN55) to understand which pages are used. Analytics is not required to train.

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