Privacy Policy
Last updated: February 2026
The Synaptic Learning Company LLC ("we," "us," or "our") operates the Synapse mobile application (the "App") and the synapseko.com website (the "Website"). This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our App and Website.
Information We Collect
Account Information
When you create an account in the App, we collect:
- Email address
- Display name
- Native language preference
- Languages you are studying
Usage Data
We automatically collect information about how you use the App and Website:
- Screen views and navigation patterns
- Feature usage (flashcards created, review sessions, karaoke usage)
- App and website performance data
- Session duration and frequency
User-Generated Content
We store content you create within the App:
- Flashcards and vocabulary lists
- Study progress and review history
- Learning algorithm data (for spaced repetition)
Device Information
When errors occur, we collect:
- Device type and model
- Operating system version
- App version
- Crash logs and error reports
Website Data
When you visit our Website, we may collect:
- Browser type and version
- Pages visited and time spent
- Referring URL
- Language preference
Cookies and Web Technologies
Our Website uses the following web storage technologies:
- localStorage — We store your language preference locally in your browser so the site appears in your chosen language on return visits. This data never leaves your device.
We do not use third-party tracking cookies. We do not use advertising cookies or pixels.
Web Analytics
Our Website uses Firebase Hosting, which may collect basic server logs (IP address, request URL, timestamp, user agent) as part of standard web hosting. These logs are used solely for operational purposes such as debugging and security monitoring.
Information We Do NOT Collect
We want to be clear about what we do not collect:
- Location data
- Voice or audio recordings
- Contacts
- Photos or camera data
- Financial information (payments are handled by Apple/Google)
Push Notifications
The App may request permission to send push notifications to remind you about study sessions. You can enable or disable notifications at any time through your device settings. We use Firebase Cloud Messaging to deliver notifications. No personal data is shared through notification content.
How We Use Your Information
We use collected information to:
- Provide and maintain the App and Website
- Personalize your learning experience
- Sync your progress across devices
- Send push notifications (with your permission)
- Analyze usage to improve the App and Website
- Diagnose and fix technical issues
- Comply with legal obligations
Third-Party Services
We use the following third-party services that may collect and process your data:
Google Firebase
- Firebase Authentication — Manages user accounts and sign-in
- Firebase Analytics — Collects anonymous usage statistics
- Firebase Crashlytics — Collects crash reports to improve stability
- Cloud Firestore — Stores your user data and content
- Firebase Cloud Messaging — Delivers push notifications
- Firebase Hosting — Serves the Website
Google's privacy policy: https://policies.google.com/privacy
Google Sign-In
If you choose to sign in with Google, we receive your email address and display name from your Google account.
Google Translate API
We use Google Translate to provide translations. Your search queries are sent to Google's servers for processing.
Google Gemini AI
We use Google's Gemini AI to generate definitions and word relationships. Your vocabulary queries are processed by Google's AI services.
YouTube
The karaoke feature extracts audio from YouTube videos. We do not share your personal data with YouTube, but video playback is subject to YouTube's Terms of Service and Privacy Policy.
Genius
We retrieve song lyrics from Genius.com. Your personal data is not shared with Genius.
Data Retention
We retain your data as follows:
- Account data — Until you delete your account
- User content — Until you delete it or your account
- Analytics data — Up to 14 months (Firebase Analytics default)
- Crash reports — Up to 90 days
- Web server logs — Up to 30 days
Data Security
We implement appropriate security measures including:
- Encryption in transit (HTTPS/TLS)
- Secure cloud infrastructure (Google Cloud Platform)
- Access controls and authentication
However, no method of electronic transmission or storage is 100% secure. We cannot guarantee absolute security.
Your Rights
All Users
You have the right to:
- Access your personal data
- Correct inaccurate data
- Delete your account and associated data
- Opt out of push notifications
- Opt out of analytics (via device settings)
European Users (GDPR)
If you are in the European Economic Area, you additionally have the right to:
- Data portability — receive your data in a structured format
- Restrict processing of your data
- Object to processing based on legitimate interests
- Lodge a complaint with your local data protection authority
California Users (CCPA)
If you are a California resident, you have the right to:
- Know what personal information we collect
- Request deletion of your personal information
- Opt out of the sale of personal information (we do not sell your data)
- Non-discrimination for exercising your rights
Children's Privacy
The App and Website are not intended for children under 13 years of age. We do not knowingly collect personal information from children under 13. If we become aware that we have collected data from a child under 13, we will delete it promptly.
International Data Transfers
Your information may be transferred to and processed in countries other than your own, including the United States, where our service providers (including Google) maintain servers. These countries may have different data protection laws than your country.
Changes to This Policy
We may update this Privacy Policy from time to time. We will notify you of significant changes by posting the new policy in the App or on the Website. Your continued use of the App or Website after changes constitutes acceptance of the updated policy.
Contact Us
For privacy-related questions or to exercise your rights, contact us at: