Privacy Policy

Last updated: October 25, 2026

Welcome to Spool Master. We take the protection of your personal data very seriously. This privacy policy explains how we collect, use, and protect your information.

1. Information We Collect

1.1 Account Information

• Email: Collected during login via Google or Apple Sign-In
• Username: Collected during login
• User ID: Automatically generated by our system

1.2 Usage Data

• Filament Spools: Information about your scanned spools (brand, color, weight, etc.)
• Inventory: Management of your filament stock
• Preferences: Language, currency, units, low stock threshold
• NFC Data: NFC chip reads/writes (stored locally on chips)
• Storage location and notes: Free text you choose to enter for each spool
• Consumption history: Decreases in the remaining weight of your spools (date, grams, material cost), used for your consumption statistics
• Shopping list: Filaments you plan to buy

1.5 Diagnostic Data

• Crash reports: Collected via Google Firebase Crashlytics (device model, OS version, technical error trace)
• Scan and sync diagnostics: Technical details of NFC reads and synchronizations (tag format and technology, chip type codes, error code, read attempts, app version, device model, OS version, device and app language)
• Usage events: App opened (at most once a day), scan result (brand, material and color read from the tag), spool added to the stock and how (manual, scan, import), action chosen after a failed scan, sign-in result, subscription purchase or restore result
• Installation identifier: A random identifier created at installation (reset if you reinstall the app), sent with the events above and with crash reports. When you are signed in, these events are also linked to your account

1.3 Subscription Information

• Purchase History: Spool Master subscriptions (monthly/annual)
• Premium Status: Information about your active subscription

1.4 Advertising Data (non-premium users)

• IDFA (iOS): Apple advertising identifier (if you accepted tracking)
• Ad Interactions: Clicks, views, impressions
• AdMob Data: Collected by Google AdMob to personalize ads

2. How We Use Your Data

2.1 App Functionality

• Manage your account and profile
• Store and synchronize your filament data
• Manage your premium subscriptions
• Provide technical support

2.2 Advertising (non-premium users only)

• Display personalized ads via Google AdMob
• Measure ad performance
• Premium users see NO ads

2.3 Analytics and Improvement

• Analyze app usage (for example: which spools and tags are read successfully, where users encounter scanning problems)
• Improve our features
• Detect and fix bugs

3. Data Sharing with Third Parties

3.1 Services Used

• Google AdMob: Advertising for non-premium users
• Google Sign-In: Authentication
• Apple Sign-In: Authentication
• Apple StoreKit / Google Play Billing: Subscription management
• Google Firebase Crashlytics: Crash reports
• Infomaniak: Hosting of our servers in Switzerland

3.2 We NEVER Sell Your Data

Your personal information is never sold to third parties. It is only shared with services necessary for app functionality, in accordance with their privacy policies.

4. Your Rights

4.1 GDPR Rights (European users)

• Right of Access: You can request a copy of your data
• Right of Rectification: You can correct your data
• Right to Erasure: You can delete your account and all your data
• Right to Object: You can refuse ad tracking
• Right to Portability: You can export your inventory, shopping list and consumption history to an Excel file directly from the app (Stock → menu → Export to Excel)

4.2 Consent Management

• Ad Tracking (ATT): You can refuse in iOS Settings → Privacy → Tracking
• GDPR: Consent form at first launch for users in the European Economic Area, the United Kingdom and Switzerland, on iPhone and Android. On iPhone, if you refuse tracking (ATT), no personalized ads are shown and the form is not displayed.
• Premium Subscription: Removes all ads and tracking

5. Account Deletion

You can delete your account at any time from the app:

1. Go to Profile
2. Click on Account Settings
3. Select Delete My Account

Important: Account deletion is permanent and immediate: your account and all associated data (spools, inventory, consumption history, shopping list, preferences, subscription status) are deleted from our servers as soon as you confirm, and your Sign in with Apple authorization is revoked. This action is irreversible.

Deleting your account does not cancel a subscription purchased through the App Store or Google Play: cancel it in your store account settings to stop future payments.

6. Data Security

• HTTPS Encryption: All communications are encrypted
• Secure Storage: Passwords and tokens are encrypted
• Secure Server: Hosted in Switzerland with high security
• Strong Authentication: Via Google or Apple Sign-In

7. Data Retention

• Active Account: As long as you use the app
• Deleted Account: Deleted immediately from our servers; residual copies in server backups are overwritten within 30 days
• System Logs: Maximum 90 days
• Subscription transaction records: Kept without any link to your account where required for accounting purposes

8. Cookies and Similar Technologies

The mobile app does not use cookies. Data is stored locally on your device via:

• Secure Storage: For authentication tokens
• Shared Preferences: For user preferences
• Hive Database: For local data cache

9. Changes to This Policy

We may update this privacy policy. Important changes will be notified via the app or by email. The last update date is shown at the top of this page.

10. Third-Party Apps and Links

Our app may contain links to external websites (e.g., in ads). We are not responsible for the privacy practices of these third-party sites.

11. Children's Privacy

Our app is not intended for children under 13. We do not knowingly collect data from minors without parental consent.

Other Languages

Politique de confidentialité (Français)

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