Privacy

Bongard keeps the data you give it. We let you export and delete it.

Bongard stores the data you give it to provide the service. You can export everything and delete your account at any time.

What we collect

We collect and store the following:

Local progress + preferences — Puzzle progress, hint counters, theme, symbols toggle, and difficulty preference stored in your browser localStorage. We never sync this to a server.Stored in your browser (localStorage). Kept permanently. Legal basis: legitimate interests. Removable when you delete your account.
Usage telemetry — Page views, puzzle-answered counts, and crash reports sent to Lotl Observe so we can see what works and what breaks. No third-party analytics; no personally-identifying data.Stored on our server. Kept permanently. Legal basis: legitimate interests. Not individually deletable. Shared with: Lotl Observe.

Third parties

These external services receive some of your data:

DigitalOcean — Static hosting for bongard.fun via the workspace nginx

Your rights

You can export everything we hold about you, and delete your account at any time. Both options live in your account settings. Deletion is immediate and unrecoverable.

Last updated: 2026-05-27.