Last updated: April 4, 2026

Introduction

Well Within is built to work without advertising or tracking. We collect only what is needed to provide fertility charting features and (if you choose) syncing.

Information We Collect

• Cycle and observation data you enter (for example: bleeding, sensation, appearance, and other daily observations)
• Email address (only if you choose to sign in)

How We Use Information

• Provide charting and pattern interpretation using a deterministic rules engine
• Sync your data across devices when you sign in
• Maintain and improve app reliability (for example: preventing sync errors)

Data Storage

• Your data is stored locally on your device.
• If you sign in, your data is synced to Supabase (used for authentication and data storage).
• Data is encrypted in transit and at rest.
• Data synced to Supabase is not end-to-end encrypted (the service can technically access stored data).

Third-Party Services

• Supabase (authentication and data storage only)

Data Sharing

We do not sell your data. We do not share your personal data with third parties for advertising, tracking, or marketing.

Your Choices