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Privacy Policy

Last updated: March 17, 2026

Paperpai OS records learning activity to help users replay, review, and improve study sessions.

What We Collect

• Handwriting data, including stroke coordinates and timing
• Audio recorded during learning sessions (when recording is enabled by the user)
• Transcripts derived from recorded audio via on-device speech recognition
• Review items, summaries, and AI-generated learning artifacts
• Basic account identifiers needed to sync data (email, display name)

How We Use Data

• To store and replay learning sessions
• To align handwriting, audio, and transcripts on a timeline
• To generate review items, summaries, and study insights via AI analysis
• To let users export or delete their learning data
• To provide teachers with aggregated (non-identifying) class performance data

What We Do Not Do

• We do not use learning data for advertising
• We do not sell learning data to third parties
• We do not enable cross-app tracking
• We do not share individual student data without explicit consent

Data Storage

• Session data is stored locally on device by default (SQLite)
• When cloud sync is enabled, data is stored on our servers for backup and multi-device access
• AI analysis is processed through third-party AI services (GLM/Zhipu) — only session statistics and transcripts are sent, not raw audio

User Controls

Users can:

• Export a single session archive
• Export all local archives
• Delete individual or all local session data
• Apply retention cleanup to remove expired data
• Disable cloud sync at any time

Children and Schools

If Paperpai OS is deployed through a school or institution, additional consent and data handling terms may apply. Schools are responsible for obtaining parental consent where required.

Contact

For privacy questions: liangjide2010@gmail.com