BetterBJJ App Privacy Policy

This Privacy Policy explains how DanDevs (e.U.) (“BetterBJJ”, “we”, “us”) collects and processes personal data when you use the BetterBJJ mobile application (“App”) and related services.

This policy is for the mobile app. Your website privacy/cookies policy is separate.

1. Data Controller (GDPR Art. 4(7))

2. What the App does

BetterBJJ helps you track Brazilian Jiu-Jitsu training by:

• •recording short voice notes after training,
• •transcribing them and extracting technique events,
• •showing analytics and (for Pro) generating AI-based suggestions such as training plans.

3. Personal data we process

4. Why we process data (purposes)

We process personal data to:

• •Provide the App and sync your training history across devices
• •Transcribe and analyze your recordings to generate training logs and metrics
• •Provide Pro features such as AI suggestions and training plans
• •Ensure security and prevent abuse
• •Improve stability and performance (analytics, crash reporting), depending on your settings/consent

5. Legal bases (GDPR Art. 6)

We rely on:

• •Contract performance (Art. 6(1)(b)) to provide the services you request
• •Legitimate interests (Art. 6(1)(f)) for security, fraud prevention, and stability (e.g., crash diagnostics)
• •Consent (Art. 6(1)(a)) where required (e.g., push notifications, optional analytics/diagnostics such as session replay if you enable it)

6. AI processing & third-party providers

To deliver transcription, parsing, and AI suggestions, we use service providers such as:

• •Google Firebase (Auth, Firestore, Cloud Functions, Analytics, Crash reporting)
• •OpenAI (transcription and language model processing)
• •Sentry (error monitoring; optional session replay/feedback features depending on configuration)
• •Expo (app services, push notifications)
• •Apple/Google (payments)
• •Subscription provider (e.g., RevenueCat) to manage entitlement status

Some providers may process data outside the EEA. Where required, we use appropriate safeguards (e.g., Standard Contractual Clauses).

7. Data retention

We keep data only as long as necessary:

• •Account and training data: until you delete your account or request deletion
• •Raw audio: not stored long-term (deleted after transcription)
• •Analytics/diagnostics: retained for a limited time depending on provider defaults and our configuration

8. Your rights (GDPR)

You have the right to:

• •Access your personal data
• •Correct inaccurate data
• •Delete your data (“right to be forgotten”)
• •Restrict processing
• •Data portability
• •Object to processing based on legitimate interests
• •Withdraw consent at any time (where processing is based on consent)
• •Lodge a complaint with a supervisory authority (in Austria: Datenschutzbehörde)

To exercise your rights, contact: contact@betterbjj.com

Account deletion: You can delete your account in-app (or contact us if the in-app option is unavailable).

Data export: We provide a machine-readable export upon request.

9. Children / minimum age

The App is intended for users aged 16 and above.

If we learn that a user is under 16, we may delete the account and associated data.

10. Security

We use appropriate technical and organizational measures such as encryption in transit, access controls, and secure cloud infrastructure.

11. Changes to this policy

We may update this policy from time to time. We will change the “Last updated” date and may notify you in-app for significant changes.

12. Contact