North and your privacy
How North, the Pulsyn AI agent, handles your data on-device and in the cloud.
Last updated: July 13, 2026
North gives you useful health coaching without asking for unnecessary trust. By default, every North conversation, memory, and insight stays on your phone.
On-device is the default
For free users and Pro users who keep the on-device setting:
- The AI model runs locally on your phone.
- Your questions and North's answers do not leave the device.
- Memory and trends are computed from data already stored on your phone.
- Voice playback, if enabled, happens entirely on-device.
Pro cloud tier is optional
Pulsyn Pro subscribers can enable the cloud tier for deeper reasoning and a longer memory window. When cloud AI is used, the relevant context is sent to our US inference provider, Fireworks.ai, to generate your answer and is not retained.
Cloud sync is a separate opt-in. If you also enable cloud sync, your encrypted history is stored on EU servers in Frankfurt. You can switch back to on-device processing at any time.
What North never does
North does not:
- send your data to train AI models
- share your biometric information with third parties
- require an internet connection for core features
- store journal text on Pulsyn servers
Read more
For a deeper explanation of the privacy architecture, see the dedicated North privacy article: Privacy and North. For the full legal view, read our Privacy Policy.