Privacy Policy

1. Information We Collect

We collect the following categories of personal information:

2. How We Use Your Information

We use the information we collect to:

• Provide, operate, and maintain the Service
• Personalize your experience and display your training statistics
• Track your fitness progress across sessions and over time
• Synchronize your data across your devices
• Respond to your customer support requests
• Send important service announcements (not marketing, unless you opt in)
• Improve app performance, fix bugs, and develop new features
• Comply with applicable legal obligations

3. Data Storage and Security

Your data is stored in Supabase, a secure cloud database platform that applies industry-standard encryption at rest and in transit (TLS/SSL). Profile photos are stored in Supabase Storage with restricted public access.

We implement appropriate technical and organizational measures — including access controls, encrypted communications, and regular security reviews — to protect your personal information against unauthorized access, alteration, disclosure, or destruction.

No method of transmission over the internet is 100% secure. While we strive to use commercially acceptable means to protect your data, we cannot guarantee its absolute security.

4. Third-Party Services

We use the following trusted third-party services to operate MaxGrind. Each is subject to its own privacy policy:

• Supabase (supabase.com) — Database, authentication, and file storage. Your data is processed and stored on Supabase's infrastructure.
• Vercel (vercel.com) — Web hosting for the MaxGrind website.
• Expo / React Native — Mobile app framework. No personal data is collected by the framework directly.
• Apple App Store / Google Play Store — App distribution platforms, governed by Apple's and Google's respective privacy policies.
• RevenueCat (revenuecat.com) — In-app purchase and subscription management for MaxGrind PRO (if applicable).
• Google AdSense (google.com/adsense) — Advertising platform. Google AdSense may serve personalized ads based on your browsing behavior using cookies and similar technologies. For more information, visit Google's advertising privacy page at https://policies.google.com/technologies/ads.

We do not sell your personal data to third parties. We share limited data with Google AdSense for the purpose of serving relevant advertisements. You can opt out of personalized advertising by visiting Google's Ad Settings (https://adssettings.google.com) or by adjusting your cookie preferences on our website.

5. Health and Fitness Data

MaxGrind collects health and fitness data — including body measurements and workout records — that you voluntarily input. This data is used exclusively to provide the Service and display your personal progress. We do not share health data with insurance companies, employers, medical providers, or any third party for purposes other than providing the Service.

MaxGrind does not currently integrate with Apple HealthKit (iOS) or Google Health Connect / Google Fit (Android). Health data within MaxGrind is not synced to or from those platforms.

6. Your Rights and Choices

You have the following rights regarding your personal data:

• Access — Request a copy of the personal data we hold about you.
• Correction — Update or correct inaccurate information at any time through the Profile section of the app.
• Deletion — Permanently delete your account and all associated data through Settings → Profile → Delete Account in the app, or by contacting us directly.
• Data Portability — Request an export of your data in a readable format.
• Opt-out — Opt out of non-essential communications at any time.

Account deletion is permanent and irreversible. All personal data, workout history, and fitness records will be permanently erased from our servers within 30 days of deletion, except where retention is required by law.

7. Children's Privacy

MaxGrind is not directed to children under the age of 13, and we do not knowingly collect personal information from anyone under 13. If you are a parent or guardian and believe your child has provided us with personal information without your consent, please contact us immediately at maxgrindteam@gmail.com and we will promptly delete such information.

Users between the ages of 13 and 18 should use the Service only with parental knowledge and consent.

8. Data Retention

We retain your personal data for as long as your account remains active or as needed to provide the Service. Fitness data you delete within the app (such as individual workout sessions) is removed immediately.

If you delete your account, all personal data will be erased or anonymized within 30 days, except where we are legally obligated to retain certain records.

9. International Data Transfers

MaxGrind is operated from Peru. By using the Service, your information may be transferred to and processed on servers located in other countries, including the United States (where Supabase and Vercel infrastructure may be located). These transfers are subject to appropriate safeguards to ensure the security of your data.

By using MaxGrind, you consent to the transfer of your information to countries outside your country of residence, which may have different data protection rules.

10. Cookies and Tracking (Website)

Our website uses essential cookies for authentication session management and language preferences. Additionally, we use Google AdSense to display advertisements, which may place advertising cookies on your device to serve personalized ads based on your browsing history. These advertising cookies are managed by Google and are subject to Google's Privacy Policy.

You can control or delete cookies through your browser settings or through our cookie consent preferences. You may also opt out of personalized advertising by visiting Google's Ad Settings (https://adssettings.google.com). Disabling essential cookies may affect the functionality of the website.

11. Changes to This Privacy Policy

We may update this Privacy Policy from time to time to reflect changes in our practices or for legal, operational, or regulatory reasons. We will notify you of significant changes by updating the “Last Updated” date at the top of this page and, where appropriate, by sending an in-app notification or email.

Continued use of the Service after the effective date of any changes constitutes your acceptance of the updated Privacy Policy.

12. Contact Us

If you have any questions, concerns, or requests regarding this Privacy Policy or your personal data, please contact us: