Your Data and Privacy

Your privacy and trust are fundamental to celesti.

We designed the system to collect only the information necessary to generate helpful insights for your day.

What Data We Use

celesti may use the following information to generate daily guidance:

calendar events (time and schedule information)
sleep or energy signals you provide
priorities you choose to share
health data from connected devices (Oura, Fitbit, Garmin, Apple Health)

This data helps celesti understand your daily context.

What We Do With Your Data

Your data is used only to generate insights and recommendations for you.

celesti does not sell or share your personal data with third parties.

Your information is not used for advertising.

Security

We take security seriously.

All user data is stored using modern encryption and secure infrastructure.

Access to systems is restricted and monitored to protect your information.

Google Calendar API Usage

celesti uses the Google Calendar API to provide personalized scheduling insights.

When you connect your Google Calendar, celesti accesses the following information:

Event titles, start times, and end times
Event duration and availability windows
Calendar metadata (read-only access)

We use the Google Calendar API scope: https://www.googleapis.com/auth/calendar.readonly

celesti's use and transfer of information received from Google APIs adheres to Google API Services User Data Policy, including the Limited Use requirements.

Calendar data is used solely to:

Generate daily schedule insights and recommendations
Identify available time blocks for focused work
Help you plan your day more effectively

You can disconnect your calendar at any time from your settings.

Health Data API Usage

celesti integrates with health and fitness devices to provide personalized energy and readiness insights.

Connecting your health devices is optional. When you connect a supported device, celesti accesses the following information:

Sleep data: Total sleep time, sleep quality score, sleep stages (deep, REM, light)
Readiness/Recovery: Daily readiness score, recovery metrics, body battery
Heart rate data: Resting heart rate, heart rate variability (HRV)
Activity data: Step count, active minutes, workout sessions

Supported health platforms:

Oura Ring: Via Oura Cloud API (read-only access to daily sleep, readiness, activity, and heart rate data)
Fitbit: Via Fitbit Web API (read-only access to sleep, activity, and heart rate data)
Garmin: Via Garmin Connect API (read-only access to sleep, wellness, and activity data)
Apple Health: Via HealthKit on iOS (read-only access to health and fitness data)

Health data is used solely to:

Auto-fill your daily energy level based on sleep quality and readiness scores
Provide personalized recommendations for work intensity and task scheduling
Identify patterns between your health metrics and productivity
Suggest recovery or rest when your body shows signs of fatigue

celesti's use of health data adheres to each provider's API terms and data policies. We request only the minimum data necessary to provide personalized insights.

Important: Health data from connected devices is not verified or validated by celesti. Insights generated from this data are for informational purposes only and should not be used for medical diagnosis or treatment decisions.

You can disconnect any health device at any time from your integrations settings. When disconnected, all health data from that source is immediately deleted from our systems.

Data Retention

We retain your data only as long as necessary to provide our services.

Data retention policies:

Calendar events: Stored temporarily and refreshed daily; historical data kept for up to 90 days for insights
Health data: Daily aggregated metrics kept for up to 90 days for trend analysis; deleted immediately upon device disconnection
Check-in data: Retained for the duration of your account to provide personalized recommendations
Account information: Deleted within 30 days of account deletion
OAuth tokens: Revoked immediately upon disconnection

Control

You remain in control of your data.

You can:

Disconnect calendar and health device integrations at any time
Delete your account and all associated data
Export your data in standard formats
Revoke access to Google Calendar from your Google Account settings
Revoke access to health devices from their respective platforms (Oura, Fitbit, Garmin, Apple Health)

at any time.

Transparency & Contact

celesti is designed to be transparent about how it uses your information.

If you have questions about privacy, data usage, or API access (Google, Oura, Fitbit, Garmin, Apple Health), please contact us:

Email: support@celesti.life
Feedback form: Submit feedback

We're committed to protecting your privacy and will respond to inquiries within 48 hours.

Your data is protected. Your trust is earned.