Privacy Policy

Last updated: July 18, 2026

GritKeep ("the app") is a personal AI fitness coaching app operated by Christopher Marsh ("we", "us"). This policy explains what data the app collects, how it is used, and your choices.

What we collect

• Account: your Apple ID sign-in (via Sign in with Apple) gives us a unique account identifier and, if you share it, your email address (Apple's private relay email is fully supported). We also store the display name you give the coach.
• Fitness profile: your training goals, experience level, schedule, available equipment, injury notes, and coaching preferences, plus the optional basics you may provide — age, biological sex, height, and weight.
• Training data: your workout plans, logged workouts and sets, check-in measurements (e.g. weight, body fat), food logs you enter, and your conversations with the coach.
• Apple Health (HealthKit): only if you grant access, the app reads weight, body fat percentage, height, and workout summaries to prefill check-ins and personalize your plan. Health data is read-only, used only for coaching features, never used for advertising or marketing, and never shared with third parties for their own purposes. HealthKit data is not stored in iCloud.
• Notifications: a device push token, so the coach can send workout reminders and (with your explicit consent and configurable quiet hours) accountability nudges.
• Diagnostics: crash reports (Firebase Crashlytics), not tied to your coaching data.

Exercise data and videos provided by MuscleWiki.com. Demo videos are streamed from MuscleWiki's servers when you open an exercise; they are never stored by the app, and no personal data is shared with MuscleWiki.

How we use it

Your data is used for one purpose: coaching you — generating and adjusting your training plan, remembering your history and preferences, tracking progress, and delivering the reminders and nudges you opted into.

To provide the AI coaching, the relevant context (your profile, plan, workout history, and messages) is processed by Anthropic's Claude API under commercial terms that do not permit Anthropic to train models on this data. Your data is stored with our infrastructure providers: Google Firebase (authentication, app services) and Neon (database), in the United States.

We do not sell your data, show ads, use tracking, or share your data with anyone for their own purposes.

Your choices and rights

• Health access is optional and can be revoked anytime in iOS Settings → Health.
• Notifications and accountability nudges are configurable in the app, including quiet hours; consent for escalating nudges can be withdrawn in Settings.
• Delete everything: Settings → Delete account permanently removes your account and all server-side data (profile, plans, workouts, measurements, food logs, coaching memory).
• Questions or requests: contact [email protected].

Not medical advice

GritKeep provides general fitness and wellness guidance only. It is not a medical device and does not provide medical advice, diagnosis, or treatment. Consult a physician before starting an exercise program, and stop and seek medical care if you experience pain, dizziness, or other concerning symptoms.

Children

The app is not directed at children under 13 (or the applicable minimum age in your region) and we do not knowingly collect data from them.

Changes

We will update this policy as the app evolves and note the date above. Material changes will be highlighted in the app.