Choices kept in your browser
My List, manual series checkpoints and the viewing-country preference are stored locally in the browser used for this site. They do not require a catalogue account and do not automatically sync to another device. Other people using the same browser profile may see the same saved choices.
Backups are copies you control
A list export contains title references and valid checkpoints. Keep it in a location appropriate for your viewing history. Clearing website data may remove the local list; create a backup beforehand when you want to retain it.
Images and viewing links
Posters and backdrops are requested from TMDB's image service. Your browser communicates with that service when loading them. Watch now sends you to JustWatch with the selected title or its viewing-page address. That destination and any provider you choose have their own privacy practices.
Browsing this catalogue does not require entering payment-card details or installing an APK. That statement does not cover every unrelated website or application using a similar name.
Shared devices
Use a separate browser profile if people want separate lists. Remove individual saved titles from their detail pages and clear checkpoints you no longer need. My List shows the choices retained in this browser.