Privacy Policy

1. Introduction

Welcome to NailGuard, a mobile app designed to help users prevent nail biting through reminders, behavior tracking, and photo progress monitoring. Your privacy is extremely important to us. This Privacy Policy explains how we collect, use, and protect your information, including payment-related data processed via RevenueCat and Apple App Store.

2. Data Controller

The data controller responsible for your personal data is:

Marcin Zurek, based in Poland
bitingnail0@gmail.com

3. Information We Collect

a) Account Information

When you register, you may use: email and password, or Google or Apple ID account sign-in. We collect this data to authenticate your account and allow access to app features.

b) Photos

You can upload photos to track your progress. These are stored securely on Supabase servers and are not shared with third parties. Access is limited to you and authorized support personnel if technical support is needed. Photos are transmitted via encrypted HTTPS connections but are not encrypted at rest.

c) Subscription and Payment Information

Use of NailGuard requires an active paid subscription. Payments are processed by Apple App Store. We do not store or process your payment details directly. Payment and subscription status are managed through RevenueCat, a third-party subscription management platform that securely communicates with Apple billing system.

RevenueCat collects limited, non-personal information such as: transaction identifiers, subscription type, start and end date, and user ID (anonymous identifier).

d) Technical Information

We collect minimal technical information such as device type, OS version, crash logs (only for debugging), and app usage necessary for functionality. Technical data and error logs are stored in Sentry (sentry.io) for debugging purposes.

e) Analytics Data

We collect analytics data about app usage to improve user experience and functionality. This data is stored in PostHog and is used solely for product improvement, not for marketing purposes.

4. How We Use the Information

We use collected data to operate and maintain your account, process subscriptions and payments, display uploaded photos, send reminders, provide support, and comply with legal obligations. We never sell or rent your personal information.

5. Data Storage and Security

Data is stored on secure servers hosted by Supabase. Subscription data may be stored by RevenueCat and Apple, depending on your purchase platform. All communications use SSL/HTTPS encryption. Access is limited to authorized personnel only.

6. Third-Party Services

We rely on third parties to deliver parts of our service:

• Supabase – Data storage and hosting (supabase.com/privacy)
• RevenueCat – Subscription management (revenuecat.com/privacy)
• Apple App Store – Payment processing (apple.com/legal/privacy/)
• Apple Sign In – Account login (apple.com/legal/privacy/)
• Google – Account login (policies.google.com/privacy)
• Sentry – Error tracking and debugging (sentry.io/privacy/)
• PostHog – Analytics (posthog.com/privacy)

7. Data Retention and Deletion

Your account and subscription data are retained as long as your account remains active. You may request deletion by contacting bitingnail0@gmail.com.

8. Your Rights (GDPR)

You have the right to access, correct, delete, restrict processing, or request portability of your data, withdraw consent, or lodge a complaint with UODO (Polish Data Protection Authority).

9. Children's Privacy

The app may be used by individuals aged 13 and older. We do not knowingly collect personal data from children under 13.

10. Changes to This Policy

We may update this Privacy Policy to reflect new features or regulatory changes.

11. Contact

Questions about this Privacy Policy can be sent to:
bitingnail0@gmail.com