Spoolary: Filament Manager

Effective date: 03 August 2025

Last updated: 29 November 2025

This Privacy Policy describes how the mobile application Spoolary (“we”, “our”, or “the app”) processes user data. We value your privacy and strive to limit data processing to the absolute minimum necessary to operate the app.

1. About the App & Data Controller

About the App

Spoolary is a mobile application designed to help users manage their 3D printer filaments efficiently. The app operates primarily on the user’s device and minimizes the collection of personal data.

Data Controller

Marc Willmann

Postfach 11 13

79337 Kenzingen

Germany

📧 contact@mwprototyping.de

📞 +49 17650211065

You can contact us at any time regarding data protection and privacy concerns.

For users in Austria or Switzerland, you can also contact the relevant national data protection authority:

• Austria: Datenschutzbehörde (https://www.dsb.gv.at/)

• Switzerland: Eidgenössischer Datenschutz- und Öffentlichkeitsbeauftragter (EDÖB) (https://www.edoeb.admin.ch/)

2. Data We Collect

a. Local App Data (Stored on Your Device)

Spoolary stores all user-generated data locally on your device only. This includes:

• Filament spool details

• 3D printer profiles

• NFC tag references

• QR codes and their associated metadata

• App preferences and settings

Crash data: Spoolary itself does not transmit crash or usage data. iOS may, however, send anonymized diagnostic and crash reports to Apple Inc., if enabled in your device settings. Processing is done exclusively by Apple according to their privacy policy. We receive only anonymized, technically necessary crash information via App Store Connect.

This data is never transmitted to servers operated or controlled by the developer and remains stored locally on your device. Any data you choose to share (e.g., via QR code, export, or subscription purchase) may be processed by third-party services such as Apple or RevenueCat. See their respective privacy policies for details.

b. Telemetry (via Telemetry Deck)

We use the privacy-friendly analytics service TelemetryDeck (provider: TelemetryDeck GmbH, Von-der-Tann-Str. 54, 86159 Augsburg, Germany) to analyze usage data. The use is based on Art. 6 para. 1 lit. b GDPR, as we require reliable and efficient tools for collecting app usage data in order to fulfill the contract with you, our customer.

What data is transferred?

The data processed by TelemetryDeck is completely anonymized and does not allow any conclusions to be drawn about personal information.

The following data is collected, among other things:

• an anonymized, untraceable user ID (per app installation),

• actions defined by the app publisher (e.g., "app launched," "settings opened"),

• a rounded timestamp (to the nearest hour),

• device metadata (e.g., system version, app version, device type),

• additional metadata defined by the app publisher (e.g., "number of items in the database").

What is not stored?

• No IP addresses (not in logs, not in the database),

• No cookies or tracking technologies,

• no persistent identifiers that could be traced back to individuals.

The source code of the TelemetryDeck SDK is completely open source and available on GitHub: https://github.com/TelemetryDeck

Further information on the exact data processing by TelemetryDeck can be found at: https://telemetrydeck.com/privacy and at https://telemetrydeck.com/docs/guides/privacy-faq/

c. In-App Purchases (via RevenueCat)

Spoolary uses RevenueCat, a third-party service, to manage in-app purchases and subscriptions. When you make a purchase, RevenueCat processes:

• An anonymous user identifier

• Purchase receipts and subscription status from Apple

We do not receive your payment or personal data.

RevenueCat's privacy policy: https://www.revenuecat.com/privacy

All actual transactions are processed by Apple, and subject to their privacy policies.

d. Apple Search Ads

We use Apple Search Ads Basic to promote our app in the App Store and encourage app installations. Apple may collect anonymized information about your interactions with our ads, such as ad clicks or app installations. 

This data is processed by Apple to measure the effectiveness of the campaigns. No personal information, such as your name or email address, is directly shared with us.

The use of Apple Search Ads is in accordance with Apple’s privacy policies. For more information, please see: Apple Privacy.

e. Contacting Support

If you contact us via email at contact@mwprototyping.de, we will process:

• Your email address

• Any information you include in your message (e.g., text, screenshots, technical details)

Your message is stored in an inbox hosted by Google LLC, which acts as a data processor. Google’s privacy policy: https://policies.google.com/privacy

We only use this information to respond to your request and delete it after your issue is resolved unless legally required to retain it longer. No other information is automatically collected or transmitted.

3. Sharing and Exporting Data

Spoolary allows users to manually share QR codes and export filament data using Apple’s iOS system sharing features (e.g., Files, Mail, WhatsApp, etc.).

This process is entirely user-initiated. The app does not access, collect, or transmit any shared or exported data.

4. Legal Basis for Processing

We process data only when necessary:

• Art. 6(1)(b) GDPR – to fulfill a contract (e.g., managing subscriptions, restore purchases)

• Art. 6(1)(f) GDPR – for our legitimate interest in responding to support inquiries

No personal data is processed for marketing or profiling. Restore Purchase only involves verification of purchase status via Apple StoreKit, without accessing user-identifiable information.

5. Data Retention

App data remains on your device until you delete it or uninstall the app.

Support emails are retained only until your request is resolved unless longer retention is legally required.

6. Your Rights Under GDPR / Local Laws

You have the right to:

• Access your data

• Request correction or deletion

• Object to or restrict processing

• Lodge a complaint with your local data protection authority

Because Spoolary does not collect or store personal data centrally, these rights generally only apply to any support emails you send us.

Access and Deletion of Local Data

All app data (filament spools, printer profiles, NFC and QR code references, app settings) is stored locally on your device. You have full control over this data: you can view, export, or delete it directly in the app, or remove all data by uninstalling the app.

Data Managed by Third Parties

Subscription-related data is handled by Apple (via the App Store) and RevenueCat. You can exercise your rights regarding this data directly through their systems:

• Apple Privacy Policy

• RevenueCat Privacy Policy

Future Telemetry / Analytics

We may integrate third-party analytics or telemetry services (e.g., Telemetry Deck) to help improve app performance. These services may process limited usage data. Any data collected is anonymized and does not include personal information unless explicitly provided by the user. We will update this Privacy Policy when such services are activated.

Children’s Privacy

Spoolary is not intended for children under 13. We do not knowingly collect personal data from children under this age. If we become aware that a child under 13 has provided personal data, we will take reasonable steps to delete it.

Parents or guardians should supervise the use of the app by children under 13.

7. International Data Transfers

We use Google LLC (based in the U.S.) for email hosting and RevenueCat (U.S.) for subscription management. Both companies use Standard Contractual Clauses (SCCs) or equivalent safeguards to protect your data under GDPR.

8. No Analytics, Tracking, or Cookies

Spoolary does not track user behavior, set cookies, or use advertising technologies.

We may use anonymized telemetry services (e.g., Telemetry Deck) solely to improve app performance and functionality.

No personal information or user-identifiable data is collected or transmitted via these services.

9. Changes to This Policy

We may update this Privacy Policy from time to time. The current version will always be available through the app and at: https://sites.google.com/mwprototyping.de/spoolary/privacy.

10. Contact

If you have any questions or concerns, contact us at:

📧 contact@mwprototyping.de