Privacy and cookie notice
What the local MVP stores in your browser, plus the information still required before advertising is enabled.
Local browser storage
BtcCal stores btccal.locale to remember your language. It also stores the last successful block height and response time to keep the countdown useful during an API outage.
These values are not used to create an account or sync across devices. Deleting site data in your browser removes them.
External block API requests
Your browser requests current height directly from Blockstream or mempool.space. Those providers may process an IP address and ordinary request logs, so their policies must be reviewed again before public launch.
Advertising and cookies
AdSense scripts and advertising cookies are not active. The page contains only empty reserved spaces to prevent future layout movement.
Before activation, the operator must confirm publisher details, Google requirements, applicable law, and a Google-certified CMP for EEA, UK, and Swiss traffic.
Items required before launch
It must be reviewed against the final domain, operator identity, contact details, processing purposes, and actual data practices before publication.