Privacy Policy
Last updated: January 4, 2026
Introduction
Welcome to Deck Builder ("we," "our," or "us"). We respect your privacy and are committed to protecting your personal data. This privacy policy explains how we collect, use, and safeguard your information when you use our mobile application.
Information We Collect
Information You Provide
- User Preferences: App settings and preferences
Automatically Collected Information
- Device Information: Device model, iOS version, and app version for troubleshooting
- Usage Data: Anonymous analytics about feature usage to improve the app
- Crash Reports: Diagnostic data when the app crashes (no personal information)
How We Use Your Information
We use the collected information to:
- Provide and maintain the app functionality
- Sync your decks and collection across your devices via iCloud
- Improve app performance and user experience
- Identify and fix bugs
- Analyze app usage to add new features
Data Storage and Security
Local Storage
Your deck and collection data is stored locally on your device using Core Data. This data remains on your device and is not sent to our servers.
iCloud Sync
If you enable iCloud sync:
- Your deck and collection data is encrypted and stored in your personal iCloud account
- We do not have access to your iCloud data
- Apple's privacy policy governs how iCloud handles your data
- You can disable iCloud sync at any time in iOS Settings
Third-Party Services
We use the following third-party services to improve the app:
- Firebase Analytics: We use Firebase Analytics to understand how the app is used and to improve performance and features. This may include collecting usage events (such as screen views and feature interactions) and device/app information (such as app version, device type, and language/region settings). Firebase may also process identifiers used for analytics. We do not intentionally send your deck names, deck lists, or collection contents to Firebase Analytics.
- iCloud (Apple CloudKit): Used to sync your decks and collection between your Apple devices. Apple’s iCloud services are governed by Apple’s privacy policies.
Data Retention
- Local data is retained until you delete the app or manually delete decks/collections
- iCloud data is retained in your iCloud account until you delete it
- Anonymous analytics are retained for 14 months
- Crash reports are retained for 90 days
Contact Us
If you have questions about this privacy policy or your data, please contact us:
Consent
By using Deck Builder, you consent to this privacy policy and our collection and use of information as described herein.