ECHO
A private, on-device “second brain” for your iPhone—capture ideas, connect notes, and surface what matters when you need it.
iOS · Apple Intelligence (on-device)
Karpathy-style second brain—on your device.
ECHO turns scattered thoughts into a searchable knowledge system. Capture notes fast, let on-device intelligence summarize and connect ideas, and build a personal memory you can rely on—without a cloud account.
What ECHO does
ECHO is a “second brain” app inspired by modern personal knowledge workflows: capture quickly, organize lightly, and rely on search + summaries to retrieve the right idea at the right time.
Core capabilities
- Fast capture for ideas, meeting notes, study notes, and daily thoughts.
- Search-first retrieval so you can find anything you’ve written.
- AI summaries & highlights generated on-device to reduce rereading.
- Connections between notes to surface related concepts and recurring themes.
- Personal knowledge library that grows over time into your own reference system.
Why on-device matters
Your “second brain” is deeply personal. ECHO uses Apple Intelligence on-device so the intelligence can be helpful while keeping your notes private.
Privacy Policy
Last Updated: April 2026
Overview
is designed with your privacy as a priority. Your knowledge base is personal and should stay under your control.
Data Collection & Storage
We do not collect, transmit, or store your personal data on external servers. Your notes and preferences are stored locally on your device using Apple’s standard storage mechanisms.
AI Processing
uses Apple on-device intelligence so processing happens on your device. Your content is not sent to external servers for AI processing.
No Accounts Required
does not require user accounts, registration, email addresses, or personal information to function. There are no analytics, tracking pixels, or advertising SDKs embedded in the app.
Data Deletion
Since data is stored locally, you have control over it. You can delete notes within the app (when available) or delete the app to remove associated data from your device.
Children's Privacy
does not knowingly collect information from children. The app contains no accounts or data collection mechanisms.
Changes to This Policy
If we update this privacy policy, we will update the "Last Updated" date above.
Contact
If you have questions about this privacy policy, please contact us at info@iasoftware.org.