Coperfumer stores your email, lesson progress, and quiz history to power learning. We use DeepSeek for short tutoring summaries after you finish a full quiz.
We use Google Analytics to understand how learners move through lessons and quizzes (for example lesson starts, answer outcomes, and completions) so we can improve quiz dynamics. Analytics events do not include your quiz answer text.
API keys stay on the server. You can request account deletion by emailing the site operator.