SecondBrain Privacy Policy
Last Updated: January 2026
Overview
SecondBrain ("the App") is committed to protecting your privacy. This policy explains how we collect, use, and safeguard your data.
Data Collection
SecondBrain operates primarily on-device. Depending on your selected Storage Mode, data handling varies:
FREE Tier (Local Storage)
- What we collect: Nothing. All memories stored locally on your device.
- Sync: No cloud sync. Data never leaves your device.
- Third parties: No data shared with any third party.
STANDARD Tier (iCloud)
- What we collect: Memory content, tags, timestamps.
- Storage: Encrypted in your personal iCloud account (Apple manages encryption).
- Sync: iCloud sync across your Apple devices (iPhone, iPad, Mac, Watch).
- Third parties: Only Apple iCloud (subject to Apple Privacy Policy).
PREMIUM Tier (CloudFlare)
- What we collect: Memory content, tags, timestamps, embeddings for semantic search.
- Storage: CloudFlare Workers KV + Vectorize (encrypted at rest).
- AI Processing: CloudFlare Workers AI for auto-correction, classification, summarization.
- Third parties: CloudFlare (subject to CloudFlare Privacy Policy).
- Data retention: Memories stored until you delete them or cancel subscription.
Voice Recognition
- Microphone: Required for voice capture feature.
- Speech Recognition: Uses Apple's on-device Speech Framework (iOS 18.2+ with Apple Intelligence).
- Transcription: Processed locally on your device. Never sent to external servers.
- Opt-in: Voice capture requires explicit microphone permission.
Apple Intelligence (iOS 18.2+)
- On-Device AI: Memory summarization and smart chat use Apple Intelligence when available.
- No external AI: All AI processing happens on-device (except PREMIUM tier CloudFlare features).
- Opt-in: Apple Intelligence features auto-enabled on supported devices.
Data Sharing
We do NOT:
- Sell your data to third parties
- Use your data for advertising
- Track your behavior across apps
- Collect analytics or telemetry (beyond standard Apple crash reports)
We DO:
- Sync via iCloud (STANDARD tier)
- Process AI embeddings via CloudFlare (PREMIUM tier)
- Use Apple's crash reporting (anonymized, opt-in via iOS Settings)
Third-Party Services
Apple iCloud (STANDARD Tier)
CloudFlare (PREMIUM Tier)
- Purpose: AI-powered semantic search, auto-correction, summarization
- Policy: CloudFlare Privacy Policy
- Region: EU data residency (CloudFlare EU servers)
Children's Privacy
SecondBrain is rated 4+ and suitable for all ages. We do not knowingly collect data from children under 13 without parental consent.
Your Rights
You have the right to:
- Access: Export your memories anytime (JSON export in Settings)
- Delete: Delete individual memories or all data (Settings → Delete All)
- Portability: Export to JSON format for migration
- Opt-out: Switch Storage Modes (FREE → STANDARD → PREMIUM)
Data Retention
- FREE Tier: Data stored locally until you delete the app
- STANDARD Tier: iCloud data persists until you delete or disable iCloud sync
- PREMIUM Tier: CloudFlare data deleted when you cancel subscription or delete memories
Security
- Encryption: All cloud storage encrypted at rest (iCloud, CloudFlare)
- Transport: HTTPS/TLS for all network communication
- Authentication: No user accounts required (FREE tier). iCloud/CloudFlare auth via API keys.
Changes to This Policy
We may update this policy. Changes will be posted in-app and on this page.
Notification: Major changes will trigger an in-app alert.
Contact
For privacy questions or data deletion requests: