Privacy Policy
Last updated: August 2025
Information We Collect
- Telegram User Data: User ID and messages sent to our bot for processing
- Learning Data: German words, sentences, and mnemonics you save
- Payment Information: Processed securely through Stripe (we don't store any payment details)
How We Use Your Information
- Provide personalized German learning experience
- Generate AI-powered mnemonics for your vocabulary
- Process subscription payments through Stripe
- Improve our service quality
Data Storage and Security
- We don't store personal information beyond what's necessary for the service
- Payment processing is handled entirely by Stripe with PCI compliance
- Your learning data is stored locally and can be exported anytime
- We never share your information with third parties
Your Rights
- Export: Download your vocabulary cards anytime using
/export - Deletion: Clear your data using
/clear_cachecommand - Control: Manage your subscription independently
Data Retention
We only retain the learning data you explicitly save. You can export or delete your data anytime using bot commands.
Contact Us
For privacy-related questions, contact us at zettelwerk [at] posteo [dot] net or use /feedback in our bot.