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Privacy: PDFs and extracted source text are processed in memory, not stored as uploaded-source files. Text is sent to the configured AI provider, whose retention policies apply. Do not upload confidential material. Signed-in accounts save generated results, including quoted citations, for 24 hours. Flashcard progress is saved on this device; chat sessions and note edits last only while this page remains open. Five successful generations per day are free across Education tools, then one credit per successful generation for signed-in users. Failed generations and unsupported Q&A answers do not spend credits.