Privacy Policy | WeightSync - Apple Health to Strava

We do not sell, share, or monetize your personal health data. This policy explains what information we collect, how we use it, and your rights regarding your data.

1. Introduction

WeightSync ("we," "our," or "us") is committed to protecting your privacy. This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our mobile application.

2. Information We Collect

2.1 Health Data

Weight Information: We access your weight data from Apple Health solely for the purpose of synchronizing it with Strava. This includes:

Body weight measurements
Date and time of weight entries
Optional extra weight values you manually add

Important:

All weight data remains on your device and is transmitted directly to Strava's servers. We do not store your weight data on our own servers.

2.2 Account Information

Strava Authentication: When you connect your Strava account, we receive:

OAuth access and refresh tokens
Token expiration timestamps

These tokens are stored securely on your device and are used to authenticate API requests to Strava.

2.3 App Usage Data

We collect minimal usage information stored locally on your device:

Sync history (dates and weights synchronized)
App preferences (unit of measurement, reminder settings)
Pending sync queue (for retry mechanism)
Premium subscription status

2.4 Information We Do NOT Collect

We do not collect:

Your name, email, or phone
Location data
Contacts or photos
Other health data
Device IDs for tracking
Analytics data

3. How We Use Your Information

Data Type	Purpose	Storage
Weight Data	Sync with Strava	Device only
Strava Tokens	API Authentication	Device (Encrypted)
Sync History	Display past syncs	Device only
Preferences	App behavior	Device only
Subscription	Enable features	Apple's servers

4. Data Storage and Security

4.1 Local Storage

All personal data is stored locally on your device using iOS secure storage mechanisms:

UserDefaults: For app preferences and settings
Keychain: For sensitive authentication tokens
No cloud storage: We do not use iCloud or our own servers for health data.

5. Data Sharing and Disclosure

5.1 Third-Party Services

Strava: We share weight data with Strava solely to update your athlete profile. Apple: Subscriptions are managed by Apple. We do not receive payment info.

5.2 We Do NOT Share Data With

Advertisers or marketing companies
Data brokers
Analytics platforms

6. Your Rights and Choices

Access & Control

View and manage all your sync history directly in the "History" section of the app.

Data Deletion

Uninstalling the app deletes all local data immediately. You can also clear history inside settings.

16. Contact Us

If you have questions or concerns about this Privacy Policy or our practices, please contact us:

Email Support

support@weightsync.app

Send Message

Medical Disclaimer:

WeightSync is a wellness and fitness tool, not a medical device. Always consult with healthcare professionals regarding your health.

Privacy Summary

Your health data stays on your device.
We only transmit weight to Strava with your consent.
We don't sell or share your data with advertisers.
Zero tracking or analytics SDKs.