Privacy Policy

Last updated: March 30, 2026

Challengrs ("we," "us," or "our") respects your privacy. This Privacy Policy explains how we collect, use, disclose, and protect your personal information when you use the Challengrs mobile application ("App") and related services.

1. Information We Collect

a. Information You Provide

Data Type	When Collected	Purpose
Email address	Account registration	Authentication, account recovery, notifications
Username	Account registration	Display name for other participants
Date of birth / age confirmation	Account registration	Verify 18+ age requirement
Profile photo	Optional, in Edit Profile	Display to other users
Proof photos	During active challenges	Challenge verification and accountability
Photo metadata (timestamp, GPS coordinates, location name)	Each proof photo upload	Verify proof authenticity (when, where); displayed to challenge participants
Payment information	Wallet deposits/withdrawals	Processed by Stripe; we do not store card numbers

b. Information Collected Automatically

Device information: Device model, operating system version, and unique device identifiers for push notification delivery (via OneSignal).
Usage data: App interactions such as challenges created, challenges joined, and proof uploads. This is used to provide the service and improve the App.
Log data: IP address, access times, and error logs for security and debugging purposes.
Strava activity data: If you connect your Strava account, we receive activity data (activity type, duration, distance) via webhook when you complete an activity. This data is used solely to auto-verify challenge proof. We do not access your full Strava profile, social data, or historical activities.

c. Photo Metadata

When you upload proof photos, the App collects the following metadata to verify the authenticity of your submission:

Timestamp: The date and time the photo was taken.
GPS coordinates: The approximate location where the photo was taken (accuracy within ~100 meters).
Location name: A human-readable place name derived from the GPS coordinates (e.g., city and state).

Important: This metadata is stored alongside your proof photo and is visible to other participants in the same challenge. This transparency helps ensure accountability and prevents fraudulent uploads. Location access is requested only when you upload a proof photo and is not tracked in the background.

d. Information We Do NOT Collect

We do not track your location in the background or outside of proof uploads.
We do not access your contacts, calendar, or other phone data.
We do not track you across other apps or websites.
We do not sell or share your data with data brokers.

2. How We Use Your Information

We use the information we collect to:

Provide and operate the Challengrs service, including challenge creation, participation, proof verification, and payout distribution.
Process payments and wallet transactions through our payment processor, Stripe.
Send push notifications including upload reminders, challenge invites, redo vote requests, and challenge results.
Communicate with you about your account, including password resets and service updates.
Detect and prevent fraud, abuse, and violations of our Terms of Service.
Improve the App and develop new features based on aggregate usage patterns.
Comply with legal obligations, including tax reporting requirements.

3. How We Share Your Information

We share your information only in the following limited circumstances:

a. With Other Users

Your username, profile photo, proof photos, and associated photo metadata (timestamp, approximate location) are visible to other participants in your challenges. This is core to how Challengrs works as an accountability platform.

b. With Service Providers

Provider	Purpose	Data Shared
Supabase	Database, authentication, file storage	Account data, proof photos
Stripe	Payment processing	Payment details (we never see full card numbers)
OneSignal	Push notifications (server events)	Device identifier, user ID
Strava	Fitness activity auto-verification	Activity data (type, duration, distance) via OAuth; only when you connect your account
Apple (App Store)	App distribution	Standard App Store analytics

c. For Legal Reasons

We may disclose your information if required by law, regulation, legal process, or governmental request. We may also disclose information to protect the rights, property, or safety of Challengrs, our users, or the public.

d. We Do NOT

Sell your personal information to third parties.
Share your data with advertisers.
Use your proof photos for any purpose outside of the Challengrs service.

4. Data Storage and Security

Your data is stored securely using Supabase (hosted on AWS infrastructure). We implement industry-standard security measures including:

Encrypted data transmission (TLS/SSL) for all communications.
Row-level security policies on our database to ensure users can only access their own data.
Secure authentication with hashed passwords (handled by Supabase Auth).
Payment data handled entirely by Stripe, which is PCI DSS Level 1 certified.

While we take reasonable measures to protect your information, no method of electronic storage or transmission is 100% secure. We cannot guarantee absolute security.

5. Data Retention

Account data: Retained for as long as your account is active.
Proof photos: Retained for the duration of the challenge plus 90 days, after which they may be deleted.
Transaction records: Retained for a minimum of 7 years for tax and legal compliance purposes.
Deleted accounts: Upon account deletion, we will delete your personal data within 30 days, except where retention is required by law.

6. Your Rights

Depending on your jurisdiction, you may have the following rights:

Access: Request a copy of the personal data we hold about you.
Correction: Request correction of inaccurate personal data.
Deletion: Request deletion of your account and associated data.
Data portability: Request your data in a portable format.
Opt-out of notifications: You can disable push notifications at any time through your device settings.

To exercise any of these rights, contact us at support@challengrs.app.

7. Push Notifications

We use a combination of iOS local notifications and OneSignal to deliver push notifications including:

Morning motivation and evening upload reminders (scheduled on-device, no data sent to servers).
Nudge reminders from other participants in your challenges.
Challenge invitations from other users.
Redo vote requests from challenge participants.
Challenge results when a challenge ends.

Daily reminders are intelligent and frequency-aware — they only fire when you still need to upload based on your challenge schedule. You can opt out of push notifications at any time by adjusting your notification settings on your device.

8. Children's Privacy

Challengrs is not intended for use by anyone under the age of 18. We do not knowingly collect personal information from children under 18. If we learn that we have collected information from a child under 18, we will delete that information promptly. If you believe a child under 18 has provided us with personal information, please contact us at support@challengrs.app.

9. Third-Party Links

The App may contain links to third-party websites or services. We are not responsible for the privacy practices of these third parties. We encourage you to review their privacy policies before providing any personal information.

10. California Residents (CCPA)

If you are a California resident, you have the right to:

Know what personal information we collect and how it is used.
Request deletion of your personal information.
Opt out of the sale of your personal information (note: we do not sell your data).
Not be discriminated against for exercising your privacy rights.

11. International Users

If you are accessing Challengrs from outside the United States, please be aware that your information may be transferred to, stored, and processed in the United States where our servers are located. By using the App, you consent to this transfer.

12. Changes to This Policy

We may update this Privacy Policy from time to time. If we make material changes, we will notify you through the App or via email. The "Last updated" date at the top of this page indicates when the policy was last revised. Your continued use of the App after changes are posted constitutes your acceptance of the updated policy.

13. Contact Us

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

support@challengrs.app