Your data.
Stubbornly
yours.

To build a workout that's stubbornly yours, Stuburn needs to know something about you. We collect only what's required to train you:

• Account: name, email, password hash, sign-in provider IDs.
• Training profile: age, height, weight, goals, sport, injuries, equipment access.
• Workout & recovery logs: sets, reps, weight, rest, AI prompts ("40 mins, leg day, lower back sore"), session history, muscle activation maps.
• Nutrition logs: meals, macros, calorie targets, and entries from our Indian food database.
• Device & usage: device type, OS, crash logs, and anonymous interaction events used to improve the app.
• Payments: handled by the App Store, Google Play, or our payment processor. We never see or store your full card number.

• Generate personalized AI workouts and sport-specific programs.
• Power your weekly muscle heat map and progressive overload tracker.
• Adjust protein and calorie targets on training vs rest days.
• Suggest stretching, cooldowns, and recovery around injuries you log.
• Run the trainer & physio marketplace when you opt in.
• Keep your account secure and prevent fraud and abuse.

When you type a workout prompt, your message and relevant training history are sent to AI models to generate your session. We do not sell this data, and we do not permit third-party AI providers to train their public models on your personal training history.

Only the service providers we need to run Stuburn — cloud hosting, analytics, crash reporting, payment processing, and AI compute. Each is bound by contract to protect your data and use it only on our behalf. If you book a trainer or physio through the marketplace, relevant context is shared with that professional so they can help you.

We keep your data while your account is active. Delete your account from inside Stuburn (Settings → Account → Delete Account) or by emailing us, and we permanently remove your training history and personal data within 30 days — except where law requires us to retain certain records (e.g. tax invoices for Stuburn Pro).

You can access, correct, export, or delete your data at any time. Email stuburn04@gmail.com and we'll respond within 30 days.

Stuburn is built for adult athletes. It is not intended for users under 13 (or the minimum age required in your country), and we do not knowingly collect data from children.

We may update this policy as Stuburn evolves. If we make material changes, we'll announce them in-app or by email before they take effect.